TITLE:
Jatropha curcas L. and J. macrocarpa Griseb: Seed Morphology, Viability, Dormancy, Germination and Growth of Seedlings
AUTHORS:
Nancy E. de las M. Tavecchio, Ana E. Vigliocco, Oscar A. Terenti, Diego Wassner, Herminda E. Reinoso, Hilda E. Pedranzani
KEYWORDS:
Dormancy, Germination, Phytohormones, Growth, Seeds, Viability
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.9,
August
14,
2018
ABSTRACT: To
achieve a good production of a crop, it is essential to know the ability of the
species to successfully complete two critical stages in the life cycle such as
germination and seedling establishment. In this paper we study in comparative form structure
of the seed, the importance of tegument in dormancy, the effect of accelerated
aging on seed germination and viability, and the early and late growth in J. curcas and J. macrocarpa. External morphology of the seeds allow difference and internally also the embryos show evident
differences. J. macrocarpa germination is around 0% - 4%. The total removal of
tegument showed a 50% increase and the other treatments between 0% - 10%. Aging accelerated by Tetrazolium test allowed a
comparative analysis of VP and GP. J.
curcas maintains both to 96 h,
while J. macrocarpa the seed viability is registered along the
all treatment. J. macrocarpa seeds have less synchronicity
than those of J. curcas. ABA and
JAs were detected in tegument of J.
macrocarpa and J.
curcas seeds. JA could have a roll in inhibition of germination of J. macrocarpa seeds. Early
and late growth, FW and DW of root, hypocotyl, epicotyl and leaf of J.
curcas were significantly
different in both species.