Photosynthetic electron transport in thylakoids from cotton cultivars (Gossypium sp.) differing in tolerance to prometryn

A method to determine photosynthetic electron transport in thylakoid membranes is described for Gossypium barbadense (cv. Pima S-7) and G. hirsutum (cv. DP 5415). These cultivars differed markedly in tolerance to prometryn, a PS II inhibitor. The rates of photosynthetic electron transport obtained w...

Full description

Saved in:
Bibliographic Details
Published in:Plant cell reports 1996-09, Vol.15 (12), p.969-973
Main Authors: KHAN, R. A, MOLIN, W. T
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cell structures and functions
Chloroplast, photosynthetic membrane and photosynthesis
Fundamental and applied biological sciences. Psychology
Molecular and cellular biology
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A method to determine photosynthetic electron transport in thylakoid membranes is described for Gossypium barbadense (cv. Pima S-7) and G. hirsutum (cv. DP 5415). These cultivars differed markedly in tolerance to prometryn, a PS II inhibitor. The rates of photosynthetic electron transport obtained were 245 μmole oxygen mg(-1) chl h(1). Plant age and leaf size influenced the activity of the thylakoid preparations. Thylakoids from leaves of plants 24 to 37 d and 50-70 mm in diameter had the highest activities; thylakoids from cotyledons, fully expanded leaves and young leaves had low activity. Thylakoids from both species had similar photosynthetic activities and I50's for prometryn, atrazine and diuron. Thus, tolerance to prometryn was not due to differential binding at D1 protein.
ISSN:0721-7714
1432-203X
DOI:10.1007/BF00231598