Comparative analysis reveals gravity is involved in the MIZ1-regulated root hydrotropism

© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 71(2020), 22 vom: 31. Dez., Seite 7316-7330
1. Verfasser: Li, Ying (VerfasserIn)
Weitere Verfasser: Yuan, Wei, Li, Luocheng, Dai, Hui, Dang, Xiaolin, Miao, Rui, Baluška, František, Kronzucker, Herbert J, Lu, Congming, Zhang, Jianhua, Xu, Weifeng
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't MIZ1 Arabidopsis gravitropism hydrotropism root water potential Arabidopsis Proteins Water 059QF0KO0R
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520 |a Hydrotropism is the directed growth of roots toward the water found in the soil. However, mechanisms governing interactions between hydrotropism and gravitropism remain largely unclear. In this study, we found that an air system and an agar-sorbitol system induced only oblique water-potential gradients; an agar-glycerol system induced only vertical water-potential gradients; and a sand system established both oblique and vertical water-potential gradients. We employed obliquely oriented and vertically oriented experimental systems to study hydrotropism in Arabidopsis and tomato plants. Comparative analyses using different hydrotropic systems showed that gravity hindered the ability of roots to search for obliquely oriented water, whilst facilitating roots' search for vertically oriented water. We found that the gravitropism-deficient mutant aux1 showed enhanced hydrotropism in the oblique orientation but impaired root elongation towards water in the vertical orientation. The miz1 mutant exhibited deficient hydrotropism in the oblique orientation but normal root elongation towards water in the vertical orientation. Importantly, in contrast to miz1, the miz1/aux1 double mutant exhibited hydrotropic bending in the oblique orientation and attenuated root elongation towards water in the vertical orientation. Our results suggest that gravitropism is required for MIZ1-regulated root hydrotropism in both the oblique orientation and the vertical orientation, providing further insight into the role of gravity in root hydrotropism 
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650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a MIZ1 
650 4 |a Arabidopsis 
650 4 |a gravitropism 
650 4 |a hydrotropism 
650 4 |a root 
650 4 |a water potential 
650 7 |a Arabidopsis Proteins  |2 NLM 
650 7 |a Water  |2 NLM 
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700 1 |a Yuan, Wei  |e verfasserin  |4 aut 
700 1 |a Li, Luocheng  |e verfasserin  |4 aut 
700 1 |a Dai, Hui  |e verfasserin  |4 aut 
700 1 |a Dang, Xiaolin  |e verfasserin  |4 aut 
700 1 |a Miao, Rui  |e verfasserin  |4 aut 
700 1 |a Baluška, František  |e verfasserin  |4 aut 
700 1 |a Kronzucker, Herbert J  |e verfasserin  |4 aut 
700 1 |a Lu, Congming  |e verfasserin  |4 aut 
700 1 |a Zhang, Jianhua  |e verfasserin  |4 aut 
700 1 |a Xu, Weifeng  |e verfasserin  |4 aut 
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