The endodermis and shoot gravitropism
- PMID: 10322541
- DOI: 10.1016/s1360-1385(99)01376-x
The endodermis and shoot gravitropism
Abstract
Shoots and roots of higher plants exhibit negative and positive gravitropism, respectively. A variety of gravitropic mutants have recently been isolated from Arabidopsis, the characterization of which demonstrates that the molecular mechanisms of the gravitropic responses in roots, hypocotyls and inflorescence stems are different. The cytological and molecular analysis of two mutants, shoot gravitropism 1 (sgrl), which is allelic to scarecrow (scr), and sgr7, which is allelic to short-root(shr), indicate that the endodermis is the site of gravity perception in shoots. These data suggest a new model for shoot gravitropism.
Comment in
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The ups and downs of gravitropism.Trends Plant Sci. 1999 Jul 1;4(7):252. doi: 10.1016/s1360-1385(99)01434-x. Trends Plant Sci. 1999. PMID: 10407439 No abstract available.
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