Effect of endogenous gibberellic acid content on physiological and yield related traits in late sown wheat
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Keywords:
high temperature, post anthesis, wheat, gibberellic acid, heat susceptibility indexAbstract
Terminal heat stress is becoming a major factor in limiting wheat production with increasing evidence of heat
stress in present scenario of climate change. Gibberellic acid is one of the major plant hormones playing crucial role
in plant development from germination to seed development, but there is huge gap in knowledge about its role under heat stress. Present study was conducted in late sown wheat (2014–15) at ICAR-IARI, New Delhi to examine the inter-relationship between gibberellic acid (GA3) level and physiological and yield related traits under heat stress in 40 wheat (Trirtcum aestivum L.) genotypes. Genotypes were categorized into three classes namely tolerant, intermediate and sensitive based on heat stress tolerance ability. The diversity in endogenous GA3 concentration was found among the cultivars. The inverse relationship between GA3 level in flag leaf and tolerance level of genotypes was found in this study through regression analysis (P<0.05). The path analysis showed that GA3 had direct negative influence on test weight under heat stress conditions. Thus, investigations of mechanism of GA3 influence on sink capacity has the potential to develop heat tolerant genotypes and increase wheat production under heat stress.
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References
Arnon D I. 1949. Copper enzymes in intact chloroplast, polyphenoxide in Beta vulgaris. Plant Physiology 24: 1–15.
Coelho Filho M A, Colebrook E H, Lloyd D P, Webster C P, Mooney S J, Phillips A L, Hedden P and Whalley W R. 2013. The involvement of gibberellin signalling in the effect of soil resistance to root penetration on leaf elongation and tiller number in wheat. Plant and soil 371(1–2): 81–9
Dhyani K, Ansari M W, Rao Y R, Verma, R S, Shukla A and Tuteja N. 2013. Comparative physiological response of wheat genotypes under terminal heat stress. Plant signalling behaviour 8(6): 245–64.
Dwivedi S K, Basu S, Kumar S, Kumar G, Prakash V, Kumar S, Mishra J S, Bhatt B P, Malviya N, Singh G P and Arora A. 2017. Heat stress induced impairment of starch mobilisation regulates pollen viability and grain yield in wheat: Study in Eastern Indo–Gangetic Plains. Field Crops Research 206: 106–14.
Farooq M, Bramley H, Palta J A and Siddique K H. 2011. Heat stress in wheat during reproductive and grain-filling phases. Critical Reviews in Plant Sciences 30(6): 491–507.
Gonzalez-Navarro O E, Griffithsb S, Moleroa G, Reynolds M P and Slaferc G A. 2015. Dynamics of floret development determining differences in spike fertility in an elite population of wheat. Field Crops Research 172: 21–31
Hiscox J D and Israelstam G F. 1979. A method for the extraction of chlorophyll from leaf tissue without maceration. Canadian Journal of Botany 57: 1332–34.
Joshi A K, Chand R, Arun B, Singh R P and Ortiz R. 2007. Breeding crops for reduced-tillage management in the intensive, rice–wheat systems of South Asia. Euphytica 153(1- 2): 135–51.
Kendall S L, Hellwege A, Marriot P, Whalley C, Graham I A and Penfield S. 2011. Induction of dormancy in Arabidopsis summer annuals requires parallel regulation of DOG1 and hormone metabolism by low temperature and CBF transcription factors. The Plant Cell 23(7): 2568–80.
Lehmann H and Vlasov P. 1988. Plant growth and stress- the enzyme hydrolysis of abscisic acid conjugate. Journal of Plant Physiology 132: 98–101.
Lobell D B, Sibley A and Ortiz-Monasterio J I. 2012. Extreme heat effects on wheat senescence in India. Nature Climate Change 2: 186–89.
Murphy A. 2015. Hormone crosstalk in plants. Journal of Experimental Botany 66(16): 4853–54.
Nagar S, Singh V P, Arora A, Dhakar R and Ramakrishnan S. 2015. Assessment of terminal heat tolerance ability of wheat genotypes based on physiological traits using multivariate analysis. Acta Physiologiae Plantarum 37(12): 1–9.
Sairam R K, Deshmukh P S and Shukla D S. 1997. Tolerance of drought and temperature stress in relation to increased antioxidant enzyme activity in wheat. Journal of Agronomy and Crop Science 178(3): 171–78.
Toker C and Cagirgan M I. 2004.The use of phenotypic correlation and factor analysis in determining characters for grain yield selection in chickpea (Cicer arietinum L.). Heriditas 140(3): 226–28.
Vettakkorumakankav N N, Falk D, Saxena P and Fletcher R A. 1999. A crucial role for gibberellins in stress protection of plants. Plant Cell Physiology 40: 542–48.
Xie Z, Jiang D, Cao W, Dai T and Jing Q. 2003. Relationships of endogenous plant hormones to accumulation of grain protein and starch in winter wheat under different post-anthesis soil water statuses. Plant growth regulation 41(2):117–27.
Yamaguchi S. 2008. Gibberellin metabolism and its regulation. Annual Review of Plant Biology 59: 225–51.
Yang J, Zhang J, Liu K, Wang Z and Liu L. 2006. Abscisic acid and ethylene interact in wheat grains in response to soil drying during grain filling. New Phytologist 171(2): 293–303.
Yang J, Zhang J, Wang Z, Zhu Q and Wang W. 2001. Hormonal changes in the grains of rice subjected to water stress during grain filling. Plant Physiology 127(1): 315–23.
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