Jasmonic acid (JA), which showed a nontoxic inhibitory effect on pollen germination in Camellia sinensis, was identified in pollens and anthers of C. sinensis, C. japonica and C. sasanqua together with its methyl ester (JA-Me); the possibility that JA is an endogenous pollen germination regulator is suggested. As JA-Me showed no effect on pollen germination, it may be form of JA inactive in pollen germination regulation.
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Yamane et al. (1982) studied this question.