Ethylene Signaling Influences Light-Regulated Development in Pea

Plant Physiology
James L WellerJames B Reid

Abstract

Plant responses to light involve a complex network of interactions among multiple plant hormones. In a screen for mutants showing altered photomorphogenesis under red light, we identified a mutant with dramatically enhanced leaf expansion and delayed petal senescence. We show that this mutant exhibits reduced sensitivity to ethylene and carries a nonsense mutation in the single pea (Pisum sativum) ortholog of the ethylene signaling gene ETHYLENE INSENSITIVE2 (EIN2). Consistent with this observation, the ein2 mutation rescues the previously described effects of ethylene overproduction in mature phytochrome-deficient plants. In seedlings, ein2 confers a marked increase in leaf expansion under monochromatic red, far-red, or blue light, and interaction with phytochromeA, phytochromeB, and long1 mutants confirms that ein2 enhances both phytochrome- and cryptochrome-dependent responses in a LONG1-dependent manner. In contrast, minimal effects of ein2 on seedling development in darkness or high-irradiance white light show that ethylene is not limiting for development under these conditions. These results indicate that ethylene signaling constrains leaf expansion during deetiolation in pea and provide further evidence that down-regulat...Continue Reading

Citations

Feb 3, 2016·Frontiers in Plant Science·Frédérique C Guinel
Sep 18, 2015·Molecular Plant Pathology·Sara N BlakeEloise Foo
Nov 5, 2016·Molecular Plant-microbe Interactions : MPMI·Aya ShimomuraAkihiro Suzuki
Feb 13, 2018·Journal of Experimental Botany·Erin L McAdamEloise Foo
Sep 2, 2017·Plant Molecular Biology·Raghavendra P SavadaDennis M Reinecke
Apr 2, 2019·Frontiers in Plant Science·Peter N McGuinessEloise Foo
Mar 12, 2021·Plant Science : an International Journal of Experimental Plant Biology·Peter N McGuinessEloise Foo
Sep 6, 2015·Plant Physiology·G Eric Schaller, Laurentius A C J Voesenek

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