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.
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Abbreviations
- GS:
-
glucan synthetase
- IAA:
-
indole-3-acetic acid
- R:
-
red light
References
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Walton, J.D., Ray, P.M. Auxin controls Golgi-localized glucan synthetase activity in the maize mesocotyl. Planta 156, 309–313 (1982). https://doi.org/10.1007/BF00397468
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DOI: https://doi.org/10.1007/BF00397468