Document Detail

Drought-induced changes in anthesis-silking interval are related to silk expansion: a spatio-temporal growth analysis in maize plants subjected to soil water deficit.
MedLine Citation:
PMID:  18518916     Owner:  NLM     Status:  MEDLINE    
The growth and emergence of maize silks has a considerable importance in yield determination under drought conditions. Spatial and temporal patterns of the rates of tissue expansion and of cell division were characterized in silks of plants subjected to different soil water potentials. In all cases, silk development consisted of four phases: (1) cell division and tissue expansion occurred together uniformly all along the silk; (2) cell division progressively ceased from tip to base, while expansion remained spatially uniform including during the phase (3) after the cessation of cell division; and (4) as the silk emerged from the husks, expansion ceased in the emerged portion, probably because of direct evaporative demand, while the relative growth rate progressively decreased in the enclosed part. The rates of tissue expansion and cell division were reduced with water deficit, resulting in delayed silk emergence. The duration of cell division was not affected, and in all cases, the end of cell division in the silk coincided with anther dehiscence. The duration of phase 3, between the end of cell division and the arrest of cell growth in silk apex, considerably increased with water deficit. It corresponded to the anthesis-silking interval used by breeders to characterize the response of cultivars to stress.
Avan Fuad-Hassan; François Tardieu; Olivier Turc
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-06-03
Journal Detail:
Title:  Plant, cell & environment     Volume:  31     ISSN:  1365-3040     ISO Abbreviation:  Plant Cell Environ.     Publication Date:  2008 Sep 
Date Detail:
Created Date:  2008-09-10     Completed Date:  2008-11-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9309004     Medline TA:  Plant Cell Environ     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1349-60     Citation Subset:  IM    
INRA and Montpellier SupAgro, UMR 759 Laboratoire d'Ecophysiologie des Plantes sous Stress Environnementaux,Montpellier, France.
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MeSH Terms
Cell Division*
Cell Size
Flowers / cytology,  growth & development
Models, Biological
Plant Epidermis / cytology*,  growth & development
Time Factors
Zea mays / growth & development*
Reg. No./Substance:
0/Soil; 7732-18-5/Water

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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