Auxin controls Golgi-localized glucan synthetase activity in the maize mesocotyl |
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| Authors: | Jonathan D. Walton Peter M. Ray |
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| Affiliation: | (1) Department of Biological Sciences, Stanford University, 94305 Stanford, CA, USA;(2) Present address: Department of Plant Breeding and Biometry, Cornell University, 14853 Ithaca, NY, USA |
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| Abstract: | Decapitation or red light irradiation (R) inhibited growth and Golgi-localized glucan synthetase (GS I) activity in the mesocotyl of intact maize (Zea mays L.) seedlings. Applied auxin (indole-3-acetic acid) prevented the effects of R and of decapitation on both growth and GS I. Auxin applied several hours after irradiation prevented any further decline in GS I but did not restore it. Mesocotyl segments incubated in solution elongated in response to auxin but lost GS I with time regardless of the presence of exogenous auxin. An attached seed was necessary for maintenance of GS I in the dark-grown mesocotyl.Abbreviations GS glucan synthetase - IAA indole-3-acetic acid - R red light |
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| Keywords: | Auxin and glucan synthetase Mesocotyl Polysaccharide synthesis Zea (glucan synthetase) |
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