Temperature stress and plant sexual reproduction: uncovering the weakest links
2010
E02702
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Title
Temperature stress and plant sexual reproduction: uncovering the weakest links
Publication Date
2010
Note
GTZ/Drought heat to, supplies
Call Number
E02702
Summary
The reproductive (gametophytic) phase in flowering plants is often highly sensitive to hot or cold temperature stresses, with even a single hot day or cold night sometimes being fatal to reproductive success. This review describes studies of temperature stress on several crop plants, which suggest that pollen development and fertilization may often be the most sensitive reproductive stage. Transcriptome and proteomic studies on several plant species are beginning to identify stress response pathways that function during pollen development. An example is provided here of genotypic differences in the reproductive stress tolerance between two ecotypes of Arabidopsis tha/iana Columbia (Col) and Hilversum (Hi-D), when reproducing under conditions of hot days and cold nights. Hi-O exhibited a more severe reduction in seed set, correlated with a reduction in pollen tube growth potential and tropism defects. Hi-Q thus provides an Arabidopsis model to investigate strategies for improved stress tolerance in pollen. Understanding how different plants cope with stress during reproductive development offers the potential to identify genetic traits that could be manipulated to improve temperature tolerance in selected crop species being cultivated in marginal climates.
Journal Citation
v.61(7):1959-1968, JOURNAL OF EXPERIMENTAL BOTANY
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