NDLI: Effects of Brassinolide and IAA on Ethylene Production and Elongation in Maize Primary Roots

Content Provider	Springer Nature Link
Author	Yun, Hye Ree Joo, Se Hwan Park, Chan Ho Kim, Seong Ki Chang, Soo Chul Kim, Soon Young
Copyright Year	2009
Abstract	We examined the effects of brassinolide (BL) and/or an auxin (indole-3-acetic acid) on ethylene production and elongation in the primary roots of maize (Zea mays). When these two hormones were applied exogenously, both increased ethylene production. Before the tenth hour after treatment began, the influence of IAA was more evident than that of BL; the reverse was found beyond 10 h. When these hormones were treated simultaneously, the increase in level of ethylene was greater than the sum of effects by each hormone. Such a positive interaction was also recorded for changes in the activity of ACC synthase and the expression of its gene. For ACC oxidase, however, the two hormones had no apparent influence. When applied separately, neither affected root elongation nor proton extrusion. However, when given in combination, both phenomena occurred. Our results suggest that BL interacts with IAA to promote ethylene biosynthesis and elongation in roots. Therefore, it is possible that brassinolide acts by inducing auxin, which then stimulates both ethylene production (at the early stage) and root development.
Starting Page	268
Ending Page	274
Page Count	7
File Format	PDF
ISSN	12269239
Journal	Journal of Plant Biology
Volume Number	52
Issue Number	3
e-ISSN	18670725
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-05-07
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Auxins Brassinosteroids Ethylene Root responses Zea mays Plant Ecology Plant Systematics/Taxonomy/Biogeography Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Plant Science

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