Is floret primordia death triggered by floret development in durum wheat?

Ferrante, Ariel, Savin, Roxana and Slafer, Gustavo A. (2013) Is floret primordia death triggered by floret development in durum wheat?. Journal of Experimental Botany, 64 10: 2859-2869. doi:10.1093/jxb/ert129


Author Ferrante, Ariel
Savin, Roxana
Slafer, Gustavo A.
Title Is floret primordia death triggered by floret development in durum wheat?
Journal name Journal of Experimental Botany   Check publisher's open access policy
ISSN 0022-0957
1460-2431
Publication date 2013
Sub-type Article (original research)
DOI 10.1093/jxb/ert129
Open Access Status DOI
Volume 64
Issue 10
Start page 2859
End page 2869
Total pages 11
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Abstract Survival of floret primordia initiated seems critical for the determination of grain number and yield in wheat, and understanding what determines floret mortality would help in the development of more robust physiological models of yield determination. The growth of the juvenile spikes has been frequently considered the determinant of grain number, implying that floret development would depend on resource availability and that the onset of floret death would be related to spike growth. However, this model has been recently challenged from a study concluding that floret death started when the most advanced floret primordia reached a particular developmental stage. As the few previous studies on this relationship involved photoperiod treatments which affect both floret development and the onset of spike growth, conclusions cannot be considered mechanistic. This comprehensive study analysed in detail floret development in wheat as affected by resource availability (mainly soil nitrogen levels) and found that the onset of floret death may occur when development of the most advanced florets ranged from stages 5 to 9 and that the average and standard deviation of floret developmental stage coinciding with the onset of floret death was not related to the level of availability of resources. These results provide further support to the model relating the onset of floret death with the initiation of active growth of the juvenile spike in which florets are developing.
Keyword Fertile floret
Floret survival
Grain number
Nitrogen
Spike dry weight
Triticum
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Tue, 23 Feb 2016, 16:34:18 EST by Anthony Yeates on behalf of Centre for Plant Science