Floral development in Thermopsis turcica, an unusual multicarpellate papilionoid legume

Sinjushin, A.A.; Tekdal, D.; Ciftci, C.; Cetiner, S.

Авторы: Sinjushin A.A., Tekdal D., Ciftci C., Cetiner S.
Журнал: Plant Systematics and Evolution
Том: 304
Номер: 4
Год издания: 2018
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 461
Последняя страница: 471
DOI: 10.1007/s00606-018-1491-6
Аннотация: The vast majority of the species of family Leguminosae have an apocarpous monomerous gynoecium. However, only a few taxa regularly produce multicarpellate gynoecia. The only known species of papilionoid legumes which has both a typical "flag blossom" and more than one carpel, is Thermopsis turcica (tribe Thermopsideae). We studied the floral ontogeny of T. turcica with special reference to its gynoecium initiation and development. Flowers arise in simple terminal racemes in a helical order and are subtended by bracts. Bracteoles are initiated but then suppressed. Sepals appear more or less simultaneously. Then petals emerge and remain retarded in development until later stages. The gynoecium usually includes three carpels with an abaxial one initiating first and two adaxial carpels arising later and developing somewhat asynchronously. The abaxial carpel appears concomitant with the outer stamens and is always oriented with its cleft towards the adaxial side while the adaxial carpels face each other with their clefts and have them slightly turned to the adaxial side. Rarely uni-, bi- or tetracarpellate flowers arise. Seed productivity of T. turcica is on approximately the same level as in unicarpellate species of Thermopsis hence supporting the fact that the multicarpellate habit is adaptive or at least not harmful in this species.
Добавил в систему: Синюшин Андрей Андреевич

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Floral development in Thermopsis turcica, an unusual multicarpellate papilionoid legumeстатья