Section 6
Chapter 5,268

Effect of root temperature on floral morphology in cowpea vigna unguiculata cultivar k 2809

Stewart, K.A.; Summerfield, R.J.

Plant and Soil 49(2): 443-449


ISSN/ISBN: 0032-079X
Accession: 005267356

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When pot-grown cowpea plants experienced a large diurnal variation in root temperature (33.degree. C day-19.degree. C night) during reproductive growth, floral morphology was markedly affected. Petals were constricted in such a way as to restrict self-pollination hence seed yields were drastically reduced. These abnormal flowers were very similar to those mediating mechanical male sterility in cowpea, a genetically inherited, recessive, outcrossing mechanism identified in field populations.

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