Journal
JOURNAL OF PLANT RESEARCH
Volume 114, Issue 1115, Pages 301-307Publisher
SPRINGER JAPAN KK
DOI: 10.1007/PL00013991
Keywords
flower development; heat shock; male sterility
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Although heat shock response in plants has been extensively studied, there has been little investigation into the effect of heat shock on plant organ development. When heat shock was applied to Arabidopsis during flower development, floral organs such as sepals, petals, stamens, and carpels developed normally. However, the development of pollen inside the anther was disrupted in a stage-specific manner, with floral stage 9 primordia failing to produce any pollen grains. Morphological analyses suggested that heat shock causes a failure of separation of pollen mother cells followed by microspore differentiation and/or inhibition of male meiotic processes. Heat shock also caused sterility in floral stage 12 flowers but the sterility was due to the failure of pollen release from the pollen sacs.
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