Fruit dimorphism in Phaseolus sublobatus (Fabaceae) and its evolutionary significance

Sharma, Subodh K. ; Babu, C. R. ; Johri, B. M. (1981) Fruit dimorphism in Phaseolus sublobatus (Fabaceae) and its evolutionary significance Plant Systematics and Evolution, 137 (1-2). pp. 67-72. ISSN 0378-2697

Full text not available from this repository.

Official URL:

Related URL:


Populations of the annual Phaseolus sublobatus from different ecogeographical zones are genetically differentiated. In twelve populations from the western ghats (Maharashtra range) chasmogamous flowers are arranged in peduncled capitate racemes borne in leaf axils of higher nodes. One population (Poona Race S4) has additional inflorescences, also with chasmogamous flowers, on the main axis between the cotyledonary node and the ground. When the pods of these flowers ripen, the inflorescence gradually coils and, eventually, gets bury the fruits in the soil. This phenomenon is not known in any other plant.—The seed-coat patterns as revealed by SEM, and germination behaviour of both aerial and subterranean seeds are similar, and both types of seeds lack dormancy.—Heavy seed predation selection pressure is probably the principal cause for the evolution of fruit dimorphism in P. sublobatus. The origin of geocarpy in relation to fruit dimorphism and seed predation is discussed.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Angiosperms; Leguminosae; Fabaceae; Phaseolus sublobatus; Geocarpy; Amphicarpy
ID Code:69195
Deposited On:02 Jul 2012 04:55
Last Modified:02 Jul 2012 04:55

Repository Staff Only: item control page