Seed Priming: Technique, Applications and Future Prospects in Vegetable Crops


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Authors

  • RAJINDER SINGH Punjab Agricultural University, Ludhiana, Punjab-141004, India Author
  • VARINDA Punjab Agricultural University, Ludhiana, Punjab-141004, India Author
  • LAVANYA VIJ Punjab Agricultural University, Ludhiana, Punjab-141004, India Author
  • NAVJYOT KAUR Punjab Agricultural University, Ludhiana, Punjab-141004, India Author

https://doi.org/10.56093/sr.v52i1.158746

Keywords:

DNA repair, Germination, Priming, Seed quality, Stress resistance, Vegetable crops

Abstract

Horticulturists all over the world are struggling to meet the market’s increasing demands for highyielding quality vegetable crops. Seed priming presents a sustainable strategy to improve crop’s physiological and field characteristics helping farmers and seed producers to ensure high crop productivity and minimise any additional input cost by ensuring optimum crop stand under normal as well as stress conditions. Current scientific trends suggest that priming may aid in the reversal of age and storage-induced seed deterioration. It aids in lowering the levels of reactive oxygen and reactive nitrogen species in seeds with better reserve mobilization, increased efficiency of antioxidant enzymes and DNA repair mechanisms. This review paper aims to summarise the latest trends in the seed priming works on the types, mechanism and efficacy of seed priming techniques in vegetable crops with a particular focus on its potential to recover aged seed via priming, along with highlighting the gaps in the current investigations that ought to be filled with future studies. The findings elucidate the great potential of priming as a technique to become a major part of integrative resource management and crop improvement programmes to address issues such as food security and crop productivity in the era of climate change.

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References

ANONYMOUS (2022). Vegetable seed market size, share and

COVID-19 impact analysis by type (open pollinated varieties

and hybrid), crop type (Solanaceae, root and bulb, cucurbit,

brassica, leafy and others), cultivation method (protected and

open field), regional forecast, 2021-2028. https://

www.fortunebusinessinsights.com/vegetable-seed-market103066

CHORMULE SR, CHANGADE NM AND PATEL JB (2018).

Effect of seed treatments on storability of vegetable seeds: a

review. Plant Archives, 18(1): 28-32.

MEMON N, GANDAHI MB, PAHOJA VM AND NASIM S

(2013). Response of seed priming with boron on germination

and seedling sprouts of broccoli. International Journal of

Agricultural Science and Research, 3(2): 183-194.

MCDONALD MB (1999). Seed deterioration: physiology, repair

and assessment. Seed Science and Technology, 27(1): 177-

FINCH-SAVAGE WE AND BASSEL GW (2016). Seed vigour

and crop establishment: extending performance beyond

adaptation. Journal of Experimental Botany, 67(3): 567-591.

SUDISHA J, NIRANJAN-RAJ S AND SHEKAR SHETTY H

(2009). Seed priming with plant gum biopolymers enhances

efficacy of metalaxyl 35 SD against pearl millet downy

mildew. Phytoparasitica, 37(2): 161-169.

MAL D, VERMA J, LEVAN A, REDDY MR, AVINASH AV AND

VELAGA PK (2019). Seed priming in vegetable crops: A

review. International Journal of Current Microbiology and

Applied Sciences, 8(6): 868-874.

BROCKLEHURST PA AND DEARMAN J (1983). Interactions

between seed priming treatments and nine seed lots of carrot,

celery and onion. II Seedling emergence and plant

growth. Annals of Applied Biology, 102(3): 585-593.

HUSSAIN S, ZHENG M, KHAN F, KHALIQ A, FAHAD S AND

PENG S (2015). Benefits of rice seed priming are offset

permanently by prolonged storage and the storage

conditions. Scientific Reports, 5(1): 1-12.

ULLAH A, FAROOQ M, HUSSAIN M, AHMAD R AND

WAKEEL A (2019). Zinc seed priming improves stand

establishment, tissue zinc concentration and early seedling

growth of chickpea. The Journal of Animal and Plant

Sciences, 29(4): 1046-1053.

VENKATASUBRAMANIAN A AND UMARANI R (2007).

Evaluation of seed priming methods to improve seed

performance of tomato (Lycoperison esculentum), egg plant

(Solanum melongena) and chilli (Capsicum annum). Seed

Science and Technology, 35(2): 487-493.

RAJ AB AND RAJ SK (2019). Seed priming: An approach

towards agricultural sustainability. Journal of Applied and

Natural Science, 11(1): 227-234.

MAHAWAR MK, SAMUEL DVK, SINHA JP AND

JALGAONKAR K (2016). Optimization of pea (Pisum sativum)

seeds hydropriming by application of response surface

methodology. Acta Physiologiae Plantarum, 38(9): 1-13.

ADHIKARI B, DHITAL PR, RANABHAT S AND POUDEL H

(2021). Effect of seed hydro-priming durations on germination

and seedling growth of bitter gourd (Momordica

charantia). PloS One, 16(8): e0255258.

DAMALAS CA, KOUTROUBAS SD AND FOTIADIS S (2019).

Hydro-priming effects on seed germination and field

performance of faba bean in spring sowing. Agriculture, 9(9):

SADEGHIAN SY AND YAVARI N (2004). Effect of water deficit

stress on germination and early seedling growth in sugar

beet. Journal of Agronomy and Crop Science, 190(2): 138-

CASENAVE EC AND TOSELLI ME (2010). Germination of

melon seeds under water and heat stress: hydropriming and

the hydrotime model. Seed Science and Technology, 38(2):

-420.

NOMKHOSI B, MABUZA M AND TANA T (2021). Effects of

osmo-priming on germination, growth and green pod yield of

okra (Abelmoschus esculentus (L.) Moench) at Luyengo,

Middleveld of Eswatini. World Journal of Advanced Research

and Reviews, 11(01): 029–038.

KIRAN KR, DEEPIKA VB, SWATHY PS, PRASAD K,

KABEKKODU SP, MURALI TS AND MUTHUSAMY A (2020).

ROS-dependent DNA damage and repair during germination

of NaCl primed seeds. Journal of Photochemistry and

Photobiology B: Biology, 213: 112050.

SINGH J, KANWAR JS AND GEETA B (2004). Seed vigour

as influenced by different seed priming treatments in okra

(Abelmoschus esculentus L. Moench). Seed Research, 32:

–125.

NALINI T, POONAM S, LAL C, KATIYAR PK AND VAISH CP

(2001). Effect of presowing seed treatments on germination

growth and yield of onion. Seed Research, 29: 238–39.

KUMAR S (2005) Influence of pre-sowing seed treatment and

seed pelleting on storability in brinjal (Solanum melongena

L). MSc (Agri) Thesis, University of Agriculture Science,

Dharwad, India.

YOGANANDA DK, VYAKARNAHAL BS AND

SHEKHARGOUDA M (2004). Effect of seed invigoration with

growth regulations and micronutrients on germination and

seedling vigour of bell pepper cv. California Wonder. Karnataka

Journal of Agricultural Science, 17(4): 811–13.

DA SILVA CB, MARCOS-FILHO J, JOURDAN P AND

BENNETT MA (2015). Performance of bell pepper seeds in

response to drum priming with addition of 24-

epibrassinolide. HortScience, 50(6): 873-878.

SUKANYA V, PATEL RM, SUTHAR KP AND SINGH D (2018).

An overview: mechanism involved in bio-priming mediated

plant growth promotion. International Journal of Pure and

Applied Bioscience, 6(5): 771-783.

SARKAR D, RAKSHIT A, PAREWA HP, DANISH S,

ALFARRAJ S AND DATTA R (2022). Bio-priming with

compatible rhizospheric microbes enhances growth and

micronutrient uptake of red cabbage. Land, 11(4): 536.

KAYMAK HÇ, GÜVENÇ Ý, YARALI F AND DÖNMEZ MF

(2009). The effects of bio-priming with PGPR on germination

of radish (Raphanus sativus L.) seeds under saline

conditions. Turkish Journal of Agriculture and Forestry, 33(2):

-179.

PAWAR VA AND LAWARE SL (2018). Seed priming a critical

review. International Journal of Advanced Research in

Biological Sciences, 5: 94-101.

LUTTS S, BENINCASA P, WOJTYLA L, KUBALA S, PACE R,

LECHOWSKA K AND GARNCZARSKA M (2016). Seed

priming: new comprehensive approaches for an old empirical

technique. New Challenges in Seed Biology-Basic and

Translational Research Driving Seed Technology, 1-46.

SINGH PK, PANDITA VK, TOMAR BS AND SETH R (2015).

Standardization of priming treatments for enhancement of seed

germination and field emergence in carrot. Indian Journal of

Horticulture, 72: 306-309.

KÊPCZYÑSKA E, PIÊKNA-GROCHALA J AND KÊPCZYÑSKI

J (2003). Effects of matriconditioning on onion seed

germination, seedling emergence and associated physical and

metabolic events. Plant Growth Regulation, 41(3): 269-278.

SANO N AND SEO M (2019). Cell cycle inhibitors improve

seed storability after priming treatments. Journal of Plant

Research, 132(2): 263-271.

ACHARYA P, JAYAPRAKASHA GK, CROSBY KM, JIFON JL

AND PATIL BS (2019). Green-synthesized nanoparticles

enhanced seedling growth, yield, and quality of onion (Allium

cepa L.). ACS Sustainable Chemistry and Engineering, 7(17):

-14590.

ACHARYA P, JAYAPRAKASHA GK, CROSBY KM, JIFON JL

AND PATIL BS (2020). Nanoparticle-mediated seed priming

improves germination, growth, yield, and quality of

watermelons (Citrullus lanatus) at multi-locations in

Texas. Scientific Reports, 10(1): 1-16.

BABY SM, NARAYANASWAMY GK AND ANAND A (2011).

Superoxide radical production and performance index of

Photosystem II in leaves from magnetoprimed soybean

seeds. Plant Signaling and Behavior, 6(11): 1635-1637.

RATHOD GR AND ANAND A (2016). Effect of seed magnetopriming on growth, yield and Na/K ratio in wheat (Triticum

aestivum L.) under salt stress. Indian Journal of Plant

Physiology, 21(1): 15-22.

GUPTA MK, ANAND A, PAUL V, DAHUJA A AND SINGH AK

(2015). Reactive oxygen species mediated improvement in

vigour of static and pulsed magneto-primed cherry tomato

seeds. Indian Journal of Plant Physiology, 20(3): 197-204.

BHARDWAJ J, ANAND A AND NAGARAJAN S (2012).

Biochemical and biophysical changes associated with

magnetopriming in germinating cucumber seeds. Plant

Physiology and Biochemistry, 57: 67-73.

HAMID N AND JAWAID F (2011). Influence of seed pretreatment by UV-A and UV-C radiation on germination and

growth of mung beans. Pakistan Journal of Chemistry, 1(4):

-167.

GUAJARDO FLORES D, SERNA GUERRERO D, SERNA

SALDÍVAR SO AND JACOBO VELÁZQUEZ DA (2014). Effect

of germination and UV C radiation on the accumulation of

flavonoids and saponins in black bean seed coats. Cereal

Chemistry, 91(3): 276-279.

OUHIBI C, ATTIA H, REBAH F, MSILINI N, CHEBBI M,

AARROUF J AND LACHAAL M (2014). Salt stress mitigation

by seed priming with UV-C in lettuce plants: Growth,

antioxidant activity and phenolic compounds. Plant Physiology

and Biochemistry, 83: 126-133.

KOTWALIWALE N, SINGH K, KALNE A, JHA SN, SETH N

AND KAR A (2014). X-ray imaging methods for internal quality

evaluation of agricultural produce. Journal of Food Science

and Technology, 51(1): 1-15.

DE MICCO V, PARADISO R, ARONNE G, DE PASCALE S,

QUARTO M AND ARENA, C (2014). Leaf anatomy and

photochemical behaviour of Solanum lycopersicum L. plants

from seeds irradiated with low-LET ionising radiation. The

Scientific World Journal, 2014.

VARIER A, VARI AK AND DADLANI M (2010). The subcellular

basis of seed priming. Current Science, 1: 450-456.

DALIL B (2014). Response of medicinal plants to seed priming:

a review. International Journal of Plant, Animal and

Environmental Sciences, 4(2): 741-745.

KAMITHI KD, WACHIRA F AND KIBE AM (2016). Effects of

different priming methods and priming durations on enzyme

activities in germinating chickpea (Cicer arietinum

L.). American Journal of Natural and Applied Sciences, 1(1):

-9.

PAPARELLA S, ARAÚJO SS, ROSSI G, WIJAYASINGHE M,

CARBONERA D AND BALESTRAZZI A (2015). Seed priming:

state of the art and new perspectives. Plant Cell Reports, 34(8):

-1293.

HUSSAIN A, RIZWAN M, ALI Q AND ALI S (2019). Seed

priming with silicon nanoparticles improved the biomass and

yield while reduced the oxidative stress and cadmium

concentration in wheat grains. Environmental Science and

Pollution Research, 26(8): 7579-7588.

GALHAUT L, DE LESPINAY A, WALKER DJ, BERNAL MP,

CORREAL E AND LUTTS S (2014). Seed priming of Trifolium

repens L. improved germination and early seedling growth on

heavy metal-contaminated soil. Water, Air and Soil

Pollution, 225(4): 1-15.

CHEN K, FESSEHAIE A AND ARORA R (2013). Aquaporin

expression during seed osmopriming and post-priming

germination in spinach. Biologia Plantarum, 57(1): 193-198.

WOJTYLA £, LECHOWSKA K, KUBALA S AND

GARNCZARSKA M (2016). Different modes of hydrogen

peroxide action during seed germination. Frontiers in Plant

Science, 7: 66.

PANT B AND BOSE B (2016). Mitigation of the influence of

PEG-6000 imposed water stress on germination of halo primed

rice seeds. International Journal of Agriculture, Environment

and Biotechnology, 9(2): 275.

DI GIROLAMO G AND BARBANTI L (2012). Treatment

conditions and biochemical processes influencing seed

priming effectiveness. Italian Journal of Agronomy, 7(2): e25.

PUKACKA S AND RATAJCZAK E (2005). Production and

scavenging of reactive oxygen species in Fagus sylvatica

seeds during storage at varied temperature and

humidity. Journal of Plant Physiology, 162(8): 873-885.

DAWOOD MG (2018). Stimulating plant tolerance against

abiotic stress through seed priming. In Advances in seed

priming (pp. 147-183). Springer, Singapore.

ÖZBINGÖL N, CORBINEAU F, GROOT SPC, BINO RJ AND

CÔME D (1999). Activation of the cell cycle in tomato

(Lycopersicon esculentum Mill.) seeds during

osmoconditioning as related to temperature and

oxygen. Annals of Botany, 84(2): 245-251.

CHEN K, FESSEHAIE A AND ARORA R (2012). Dehydrin

metabolism is altered during seed osmopriming and

subsequent germination under chilling and desiccation in

Spinacia oleracea L. cv. Bloomsdale: possible role in stress

tolerance. Plant Science, 183: 27-36.

YADAV PV, MAYA K AND ZAKWAN A (2011). Seed priming

mediated germination improvement and tolerance to

subsequent exposure to cold and salt stress in

capsicum. Research Journal of Seed Science, 4(3): 125-136.

WU L, HUO W, YAO D AND LI M (2019). Effects of solid matrix

priming (SMP) and salt stress on broccoli and cauliflower seed

germination and early seedling growth. Scientia

Horticulturae, 255: 161-168.

NAVITHA P, SUJATA K AND BEAULAH A (2019). Effect of

chemoprimimg on physiological quality of cucumber (Cucumis

sativus). International Journal of Chemical Studies, 7(2): 1729-

AMOOAGHAIE R, NIKZAD K AND SHAREGHI B (2010). The

effect of priming on emergence and biochemical changes of

tomato seeds under suboptimal temperatures. Seed Science

and Technology, 38(2): 508-512.

ANESE S, DA SILVA EAA, DAVIDE AC, ROCHA FARIA JM,

SOARES GCM, MATOS ACB AND TOOROP PE (2011). Seed

priming improves endosperm weakening, germination, and

subsequent seedling development of Solanum lycocarpum St.

Hill. Seed Science and Technology, 39(1): 125-139.

PRADHAN N, PRAKASH P, MANIMURUGAN C, TIWARI SK,

SHARMA RP AND SINGH PM (2015). Screening of tomato

genotypes using osmopriming with PEG 6000 under salinity

stress. Research in Environmental and Life Sciences, 8: 245-

SAINI R, RAI PK, BARA BM, SAHU P, ANJER T AND KUMAR

R (2017). Effect of different seed priming treatments and its

duration on seedling characters of bitter gourd (Momordica

charantia L.). Journal of Pharmacognosy and Phytochemistry,

(5): 848-850.

REHMAN H, FAROOQ M, BASRA SMA AND AFZAL I (2011).

Hormonal priming with salicylic acid improves the emergence

and early seedling growth in cucumber. Journal of Agricultural

Sciences, 7: 109-113.

SINGH DK AND PANDEY UB (2003). Effect of hydrationdehydration and priming on seed germination and vigour of

onion (Allium cepa L. var. Agrifound Dark Red) in field

conditions. NHRDF Newsletter, 23: 13-15.

RAJ AB, RAJ SK, PRATHAPAN K AND RADHAKRISHNAN

NV (2020). Nutripriming with zinc sulphate and borax for early

growth and seedling vigour in grain cowpea [Vigna unguiculata

(L.) Walp]. Legume Research-An International Journal, 43(2):

-262.

GANDAHI MB, NOOR-UN-NISA M, MEHRUNISA M, MIANO

TF AND ABBASI FF (2017). Effects of nutripriming on

germination and seedling growth of cole vegetables.

Bangladesh Journal of Botany, 46(2): 653-658.

SARKAR D AND RAKSHIT A (2021). Bio-priming in

combination with mineral fertilizer improves nutritional quality

and yield of red cabbage under Middle Gangetic Plains,

India. Scientia Horticulturae, 283: 110075

PATRA DD (2016). Unravelling plant-rhizopsphere-microbe

interactions: an overview. Journal of the Indian Society of Soil

Science, 64: 14-26.

SIVAKALAI R AND KRISHNAVENI K (2017). Effect of

biopriming on seed yield and quality in pumpkin cv CO

International Journal of Current Microbilogy and Applied

Sciences, 6(12): 85-90.

ANANTHI M, SELVARAJU P AND SUNDARALINGAM K

(2014). Effect of bio-priming using bio-control agents on seed

germination and seedling vigour in chilli (Capsicum annuum

L.) ‘PKM 1’. The Journal of Horticultural Science and

Biotechnology, 89(5): 564-568.

KANWAR R AND MEHTA DK (2017). Studies on solid matrix

priming of seeds in bitter gourd (Momordica charantia

L.). Journal of Applied and Natural Science, 9(1): 395-401.

ALMUTAIRI ZM AND ALHARBI A (2015). Effect of silver

nanoparticles on seed germination of crop plants. International

Journal of Agricultural and Biological Engineering, 9: 667-71.

DEHKOURDI EH, CHEHRAZI M, HOSSEINI H AND

HOSSEINI M (2014). The effect of anatase nanoparticles

(TiO2) on pepper seed germination (Capsicum annum

L.). International Journal of Biosciences, 4(5): 141-145.

HEGAZI AZ AND HAMIDELDIN N (2010). The effect of gamma

irradiation on enhancement of growth and seed yield of okra

[Abelmoschus esculentus (L.) Monech] and associated

molecular changes. Journal of Horticulture and Forestry, 2(3):

-051.

MOUSSA HR (2006). Role of gamma irradiation in regulation

of NO3 level in rocket (Eruca vesicaria subsp. sativa)

plants. Russian Journal of Plant Physiology, 53(2): 193-197.

PEREIRA MD, DIAS DCFDS, DIAS LADS AND ARAÚJO EF

(2009). Primed carrot seeds performance under water and

temperature stress. Scientia Agricola, 66: 174-179.

ANDREOTTI C (2020). Management of abiotic stress in

horticultural crops: spotlight on biostimulants. Agronomy,

(10):1514.

YAN M (2015). Seed priming stimulate germination and early

seedling growth of Chinese cabbage under drought

stress. South African Journal of Botany, 99: 88-92.

YAN M (2016). Hydro-priming increases seed germination and

early seedling growth in two cultivars of Napa cabbage

(Brassica rapa subsp. pekinensis) grown under salt stress. The

Journal of Horticultural Science and Biotechnology, 91(4): 421-

KHAN HA, AYUB, CM, PERVEZ MA, BILAL RM, SHAHID MA

AND ZIAF K (2009). Effect of seed priming with NaCI on salinity

tolerance of hot pepper (Capsicum annuum L.) at seedling

stage. Soil and Environment, 28(1): 81-87.

SARWAR M, AMJAD M AND AYYUB CM (2017). Alleviation

of salt stress in cucumber (Cucumis sativus) through seed

priming with triacontanol. International Journal of Agriculture

and Biology, 19:4.

GHASEEMI-GOLEZANI K AND ESMAEILPOUR B (2008).

The effect of salt priming on the performance of differentially

matured cucumber (Cucumis sativus) seeds. Notulae

Botanicae Horti Agrobotanici Cluj-Napoca, 36(2): 67-70.

WORRALL D, HOLROYD GH, MOORE JP, GLOWACZ M,

CROFT P, TAYLOR, JE AND ROBERTS MR (2012). Treating

seeds with activators of plant defence generates long lasting

priming of resistance to pests and pathogens. New

Phytologist, 193(3): 770-778.

SONG Y, CHEN D, LU K, SUN Z AND ZENG R (2015).

Enhanced tomato disease resistance primed by arbuscular

mycorrhizal fungus. Frontiers in Plant Science, 6, 786.

MAHESH HM, MURALI M, PAL MAC, MELVIN P AND

SHARADA MS (2017). Salicylic acid seed priming instigates

defense mechanism by inducing PR-Proteins in Solanum

melongena L. upon infection with Verticillium dahliae

Kleb. Plant Physiology and Biochemistry, 117: 12-23.

ENTESARI M, SHARIFZADEH F, AHMADZADEH M AND

FARHANGFAR M (2013). Seed biopriming with Trichoderma

species and Pseudomonas fluorescent on growth parameters,

enzymes activity and nutritional status of soybean.

International Journal of Agronomy and Plant Production, 4(4):

-619.

PILL WG, COLLINS CM, GOLDBERGER B AND GREGORY

N (2009). Responses of non-primed or primed seeds of

‘Marketmore 76’ cucumber (Cucumis sativus L.) slurry coated

with Trichoderma species to planting in growth media infested

with Pythium aphanidermatum. Scientia Horticulturae, 121(1):

-62.

TAYLOR AG, HARMAN GE AND NIELSEN PA (1994).

Biological seed treatments using Trichoderma harzianum for

horticultural crops. HortTechnology, 4(2): 105-109.

BROWN JE, LU TY, STEVENS C, KHAN VA, LU JY, WILSON

CL AND DROBY S (2001). The effect of low dose ultraviolet

light-C seed treatment on induced resistance in cabbage to

black rot (Xanthomonas campestris pv. campestris). Crop

Protection, 20(10): 873-883.

SONG GC, CHOI HK, KIM YS, CHOI JS AND RYU CM (2017).

Seed defense biopriming with bacterial cyclodipeptides triggers

immunity in cucumber and pepper Scientific Reports, 7(1), 1-

SINGH P, SINGH J, RAY S, RAJPUT RS, VAISHNAV A,

SINGH RK AND SINGH HB (2020). Seed biopriming with

antagonistic microbes and ascorbic acid induce resistance in

tomato against Fusarium wilt. Microbiological Research, 237:

AKELLO J, CHABI-OLAYE A AND SIKORA RA (2017). Insect

antagonistic bio-inoculants for natural control of leaf-mining

insect pests of french beans. African Crop Science

Journal, 25(2): 237-251.

RAJ AK, DAS H AND BASU AK (2019). Response of biopriming in okra for vegetable production. Journal of Applied

and Natural Sciences, 11: 687-693.

AGRAWAL RL (ed) (1995). Seed Technology. pp 410-12.

Oxford and IBH Publishing, New Delhi

KIBINZA S, BAZIN J, BAILLY C, FARRANT JM, CORBINEAU

F AND EL-MAAROUF-BOUTEAU H (2011). Catalase is a key

enzyme in seed recovery from ageing during priming. Plant

Science, 181(3): 309-315.

KIBINZA S, VINEL D, CÔME D, BAILLY C AND CORBINEAU

F (2006). Sunflower seed deterioration as related to moisture

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Submitted

2024-10-23

Published

2024-10-28

How to Cite

RAJINDER SINGH, VARINDA, LAVANYA VIJ, & NAVJYOT KAUR. (2024). Seed Priming: Technique, Applications and Future Prospects in Vegetable Crops. Seed Research, 52(1), 41-57. https://doi.org/10.56093/sr.v52i1.158746