Seed dormancy, germination and seed storage in henna (Lawsonia inermis)

S S PARIHAR; M DADLANI; DEBARATI MUKHOPADHYAY; SANDEEP K LAL

doi:10.56093/ijas.v86i9.61520

Authors

S S PARIHAR ICAR-Indian Agricultural Research Institute, New Delhi 110 012
M DADLANI ICAR-Indian Agricultural Research Institute, New Delhi 110 012
DEBARATI MUKHOPADHYAY ICAR-Indian Agricultural Research Institute, New Delhi 110 012
SANDEEP K LAL ICAR-Indian Agricultural Research Institute, New Delhi 110 012

https://doi.org/10.56093/ijas.v86i9.61520

Keywords:

Dormancy, Germination, Henna, Lawsonia inermis, Seed storage, Seed longevity

Abstract

Henna (Lawsonia inermis L.) is an important commercial plant of India grown mainly for its leaves used for dying hair, skin etc. The seeds of henna are small typically pyramidal, endospermic with a linear embryo. The freshly harvested seeds show endogenous non-deep physiological dormancy and pre-treatment of seeds, viz. leaching, chilling, priming, GA₃ and KNO₃ co-application reduced dormancy. The physiological dormancy was transitory and disappeared during storage due to after-ripening. Seed storage studies revealed that seeds with 5 and 7 % moisture content did not show significant reduction in seed longevity up to 24 months in ambient storage in comparison to seeds with higher moisture content. Seed deterioration was slow at 15 and â€“20oC storage temperatures. The seeds are desiccation as well as chilling tolerant, therefore, exhibit orthodox seed storage behaviour which makes them ideal for ex-situ conservation in seed banks for long term storage.

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