期刊
CURRENT OPINION IN PLANT BIOLOGY
卷 41, 期 -, 页码 89-94出版社
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2017.10.003
关键词
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资金
- National Institutes of General Medical Sciences of the National Institutes of Health [R01 GM069418]
- National Science Foundation [IOS 1238040]
- Direct For Biological Sciences [1238040] Funding Source: National Science Foundation
- Division Of Integrative Organismal Systems [1238040] Funding Source: National Science Foundation
While fast plant movements are spectacular but rare, almost all plants exhibit relatively slow, growth-mediated tropic movements that are key to their survival in the natural world. In this brief review, we discuss recent insights into the molecular mechanisms underlying phototropism, gravitropism, hydrotropism, and autostraightening. Careful molecular genetic and physiological studies have helped confirm the importance of lateral auxin gradients in gravitropic and phototropic responses. However, auxin signaling does not explain all tropisms: recent work has shown that abscisic acid signaling mediates root hydrotropism and has implicated mechanosensing in autostraightening, the organ straightening process recently modeled as a proprioceptive response. The interactions between distinct tropic signaling pathways and other internal and external sensory processes are also now being untangled.
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