NDLI: Regulation of root growth by auxin and ethylene is influenced by phosphate supply in white clover (Trifolium repens L.)

Content Provider	Springer Nature Link
Author	Dinh, Phuong T. Y. Roldan, Marissa Leung, Susanna McManus, Michael T.
Copyright Year	2011
Abstract	The influence of P-supply on root system architecture (primary root length, number and total length of lateral roots) through the effects of ethylene (ACC) and auxin [1-naphthylacetic acid (NAA)] has been examined in the legume white clover (Trifolium repens L.). Higher concentrations (1 and 10 μM) of ACC and NAA (100 nM) inhibited growth, while lower concentrations (100 nM ACC, 5 nM NAA) either had no effect or stimulated growth in P-sufficient (1 mM Pi) roots. In response to low (10 μM) P, a stimulation of primary root growth, number of lateral roots and mean length of lateral roots was observed, while a super-stimulation of these growth parameters occurred in response to subsequent 100 nM ACC treatment suggesting that the low P treatment increased the sensitivity of the roots to ethylene. Examination of the primary roots of DR5p::GUS transformants suggests that this change in sensitivity induced by low P occurs through the promotion of auxin signalling/transport to the root apex. These results are discussed in terms of the role of ethylene and the significance of changes in sensitivity to the hormone in modulating root system architecture in response to low P-supply.
Starting Page	179
Ending Page	190
Page Count	12
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	66
Issue Number	2
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-12-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Auxin Ethylene Phosphate supply Root development Trifolium repens L. White clover Agriculture Plant Anatomy/Development Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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