Reduction of indole-3-acetic acid methyltransferase activity compensates for high-temperature male sterility in Arabidopsis.

ABSTRACT: High temperature is a general stress factor that causes a decrease in crop yield. It has been shown that auxin application reduces the male sterility caused by exposure to higher temperatures. However, widespread application of a hormone with vast effects on plant physiology may be discouraged in many cases. Therefore, the generation of new plant varieties that locally enhance auxin in reproductive organs may represent an alternative strategy. We have explored the possibility of increasing indole-3-acetic acid (IAA) in ovaries by reducing IAA methyltransferase1 (IAMT1) activity in Arabidopsis thaliana. The iamt1 mutant showed increased auxin signalling in funiculi, which correlated with a higher growth rate of wild-type pollen in contact with mutant ovaries and premature ovule fertilizatio

SUBMITTER: Abbas M 

PROVIDER: S-EPMC5785359 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature