Changes in ultrastructure of Phaseolus vulgaris L. cotyledons associated with their modulated life span

Title:

Changes in ultrastructure of Phaseolus vulgaris L. cotyledons associated with their modulated life span

Creator:

Kutík, J., Wilhelmová, N., and Snopek, J.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b7eb6e08-f1c5-41dc-93f0-6bae757c4be5
uuid:b7eb6e08-f1c5-41dc-93f0-6bae757c4be5
issn:0300-3604
doi:10.1023/A:1006908217443

Subject:

cell ultrastructure, chloroamyloplasts, chloroplasts, electron microscopy, fluorescence microscopy, French bean, gerontoplasts, and senescence

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

French bean (Phaseolus vulgaris L.) cotyledons lost most of their reserve substances during several early days of germination and turned green. In cotyledon mesophyll cells of one-week-old seedlings, plastids were represented predominantly by amyloplasts (starch grains) and chloroamyloplasts, and the cells appeared to be metabolically highly active. Cell heterogeneity associated with distance of the cells from cotyledon vascular bundles was evident. Only mesophyll cells near to the bundles were rich in plastids. In two-weeks-old intact bean plants, the cotyledons were yellow and shrunken, and their cells were nearly "empty". The plastids in them were represented by senescent plastids (gerontoplasts) only. In the gerontoplasts as well as freely in cytosol, fluorescent lipoid inclusions were accumulated. This cotyledon development was more or less independent of irradiance. In "decapitated" bean plants, senescence of mesophyll cells and plastids was slowed down considerably, and the life span of the cotyledons was prolonged. and J. Kutík, N. Wilhelmová, J. Snopek.

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

361-367

Source:

Photosynthetica | 1998 Volume:35 | Number:3

Harvested from:

CDK

Metadata only:

false