Skip Navigation



Plant and Cell Physiology Advance Access published online on March 15, 2006
Plant and Cell Physiology, doi:10.1093/pcp/pcj033
This Article
Right arrow Advance Access manuscript (PDF)
Right arrow All Versions of this Article:
47/5/644    most recent
pcj033v1
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 Similar articles in PubMed
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 Araya, T.
Right arrow Articles by Terashima, I.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Araya, T.
Right arrow Articles by Terashima, I.
Agricola
Right arrow Articles by Araya, T.
Right arrow Articles by Terashima, I.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Plant and Cell Physiology 2006 © The Japanese Society of Plant Physiologists (JSPP); all rights reserved.
Received December 12, 2005
Accepted March 8, 2006

Regular Paper

Effects of Carbohydrate Accumulation on Photosynthesis Differ between Sink and Source Leaves of Phaseolus vulgaris L.

Takao Araya 1 *, Ko Noguchi 1, and Ichiro Terashima 1

1 Department of Biology, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, 560-0043, Japan

* To whom correspondence should be addressed.
Takao Araya, E-mail: araya{at}bio.sci.osaka-u.ac.jp


  Abstract

Accumulation of non-structural carbohydrate in leaves represses photosynthesis. However, the extent of repression should be different between sink leaves (sugar consumers) and source leaves (sugar exporters). We investigated effects of carbohydrate accumulation on photosynthesis in the primary leaves of bean (Phaseolus vulgaris L.) during the leaf expansion. To increase the carbohydrate content of the leaves, we supplied 20 mM sucrose solution to the roots for 5 days (sugar-treatment). The plants supplied only water and nutrients were used as controls. The carbohydrate contents, which are sum of glucose, sucrose, and starch, of the sugar-treated leaves, were 1.5-3 times of those of the control leaves at any developmental stage. In the young sink leaves, the photosynthetic rate at saturating light and at an ambient CO2 concentration (A360) did not differ between the sugar-treated and control leaves. A360 of sugar-treated source leaves gradually decreased relative to the control source leaves with the leaf expansion. The initial slope of the A-Ci curve, and Rubisco content per leaf area showed trends similar to that of A360. Differences in Amax between the treatments were slightly smaller than those in A360. These results indicate that the effect of carbohydrate accumulation on photosynthesis is significant in the source leaves, but not in the young sink leaves, and that the decrease in Rubisco content was the main cause of the carbohydrate repression of photosynthesis.

Keywords: Bean (Phaseolus vulgaris L.); Carbohydrate repression of photosynthesis; Depletion of Orthophosphate; Mesophyll conductance (gi); Rubisco; Sugar-treatment.
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
 jashsHome page
M. Sagaram and J. K. Burns
Leaf Chlorophyll Fluorescence Parameters and Huanglongbing
J. Amer. Soc. Hort. Sci., March 1, 2009; 134(2): 194 - 201.
[Abstract] [Full Text] [PDF]

Home page
 Plant Physiol.Home page
H. D. Coleman, A. L. Samuels, R. D. Guy, and S. D. Mansfield
Perturbed Lignification Impacts Tree Growth in Hybrid Poplar--A Function of Sink Strength, Vascular Integrity, and Photosynthetic Assimilation
Plant Physiology, November 1, 2008; 148(3): 1229 - 1237.
[Abstract] [Full Text] [PDF]

Home page
 J. Environ. Qual.Home page
M. Schiavon, E. A.H. Pilon-Smits, M. Wirtz, R. Hell, and M. Malagoli
Interactions between Chromium and Sulfur Metabolism in Brassica juncea
J. Environ. Qual., June 23, 2008; 37(4): 1536 - 1545.
[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.