Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Guiamét, J. J.
Right arrow Articles by Noodén, L. D.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Guiamét, J. J.
Right arrow Articles by Noodén, L. D.
Agricola
Right arrow Articles by Guiamét, J. J.
Right arrow Articles by Noodén, L. D.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology, 1990, Vol. 31, No. 8 1123-1130
© 1990

Article

Effects of Nuclear and Cytoplasmic Genes Altering Chlorophyll Loss on Gas Exchange during Monocarpic Senescence in Soybean

Juan J. Guiamét1,3, James A. Teeri2 and Larry D. Noodén1

1Biology Department, University of Michigan Ann Arbor, MI 48109-1048, U.S.A.
2Biological Station, University of Michigan Ann Arbor, MI 48109-1048, U.S.A.

Several genes can alter the yellowing processes that normally occur during pod development and monocarpic senescence in soybean. CytG and d1 + d2 cause the leaves and seeds to stay green at maturity. G blocks yellowing of the seed coat but not the leaves or embryos. By contrast, another gene, y3, causes earlier yellowing of the leaves. This paper examines the effects of these genes on photosynthesis and some related parameters of the senescence syndrome in near-isogenic backgrounds (cv. Clark). Neither cytG nor d1 d2 delays the decline in photosynthetic rate during monocarpic senescence relative to Clark; while Gd1 d2 does. Again, y3 causes an earlier decrease. Similarly, neither cytG nor d1 d2 alters the decline in stomatal conductance and transpiration, which occurs at the end of podfill; however, Gd1 d2 delays it and y3 advances it. Neither cytG nor d1 d2 prevents the rise in intercellular CO2 during podfill, while Gd1 d2 does, and y3promotes it. These changes in intercellular CO2 may reciprocally reflect the status (maintenance for Gd1 d2 and early loss for y3) of the photosynthetic enzymes. Gd1 d2, d1 d2 and cytG do not appreciably affect leaf blade abscission; however, y3 prevents it. Gd1 d2 increases the dry weight seed yield, and y3 decreases it. Gd1 d2 inhibits several components in the senescence process, while cytG seems to affect mainly chlorophyll loss and y3 may act more broadly than just accelerating senescence. Clearly, the stay-green trait can be caused by more than one genetic locus, and it may or may not maintain photosynthesis.

3Present address: Instituto de Fisologia Vegetal, Facultad de Agronomia, c.c. 31, 1900-La Plata, Argentina

(Received May 18, 1990; Accepted September 4, 1990)
Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Plant Physiol.Home page
G. Ren, K. An, Y. Liao, X. Zhou, Y. Cao, H. Zhao, X. Ge, and B. Kuai
Identification of a Novel Chloroplast Protein AtNYE1 Regulating Chlorophyll Degradation during Leaf Senescence in Arabidopsis
Plant Physiology, July 1, 2007; 144(3): 1429 - 1441.
[Abstract] [Full Text] [PDF]

Home page
 J Exp BotHome page
V. M. Luquez and J. J. Guiamet
The stay green mutations d1 and d2 increase water stress susceptibility in soybeans
J. Exp. Bot., June 1, 2002; 53(373): 1421 - 1428.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.