Document Detail

Mesophyll photosynthesis and guard cell metabolism impacts on stomatal behaviour.
MedLine Citation:
PMID:  25077787     Owner:  NLM     Status:  In-Data-Review    
1064 I. 1064 II. 1066 III. 1066 IV. 1068 V. 1069 VI. 1070 VII. 1070 VIII. 1070 IX. 1071 X. 1072 XI. 1074 XII. 1074 1076 References 1076 SUMMARY: Stomata control gaseous fluxes between the internal leaf air spaces and the external atmosphere. Guard cells determine stomatal aperture and must operate to ensure an appropriate balance between CO2 uptake for photosynthesis (A) and water loss, and ultimately plant water use efficiency (WUE). A strong correlation between A and stomatal conductance (gs ) is well documented and often observed, but the underlying mechanisms, possible signals and metabolites that promote this relationship are currently unknown. In this review we evaluate the current literature on mesophyll-driven signals that may coordinate stomatal behaviour with mesophyll carbon assimilation. We explore a possible role of various metabolites including sucrose and malate (from several potential sources; including guard cell photosynthesis) and new evidence that improvements in WUE have been made by manipulating sucrose metabolism within the guard cells. Finally we discuss the new tools and techniques available for potentially manipulating cell-specific metabolism, including guard and mesophyll cells, in order to elucidate mesophyll-derived signals that coordinate mesophyll CO2 demands with stomatal behaviour, in order to provide a mechanistic understanding of these processes as this may identify potential targets for manipulations in order to improve plant WUE and crop yield.
Tracy Lawson; Andrew J Simkin; Gilor Kelly; David Granot
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The New phytologist     Volume:  203     ISSN:  1469-8137     ISO Abbreviation:  New Phytol.     Publication Date:  2014 Sep 
Date Detail:
Created Date:  2014-08-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882884     Medline TA:  New Phytol     Country:  England    
Other Details:
Languages:  eng     Pagination:  1064-81     Citation Subset:  IM    
Copyright Information:
© 2014 The Authors. New Phytologist © 2014 New Phytologist Trust.
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