GROWTH, DEVELOPMENT AND RESPIRATION IN THE OVULES OF ZEPHYRANTHES LANCASTERI AT DIFFERENT STAGES OF MATURATION |
| |
Authors: | JOHRI M M; MAHESHWARI SATISH C |
| |
Institution: | Department of Botany, University of Delhi Delhi-7 India |
| |
Abstract: | Changes in the rate of respiration and activity of succinicdehydrogenase in the ovules, embryo and endosperm have beeninvestigated at different stages of seed development in Z. lancasteri.An attempt has been made to find any possible relation betweenphysiological changes and the growth pattern of ovule. The fertilizedovules mature into seeds in 1619 days from the time ofpollination. The respiratory course and the growth of ovulesfollow identical trends. The curve for oxygen uptake is characterizedby at least two peaks; the first on the sixth or seventh dayis related to the laying down of walls in the coenocytic micropylarchamber of the endosperm and the second on the 11th day precedesthe elongation of cotyledon. In excised endosperm the activityof succinic dehydrogenase is highest during its transformationfrom freenuclear to cellular state, while in the embryo it isso after the attainment of mature size.
1Present address: AEC Plant Research Laboratory, Michigan StateUniversity, East Lansing, Mich., U.S.A. |
| |
Keywords: | |
本文献已被 Oxford 等数据库收录! |
|