【摘 要】
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Any two people on Earth may be connected by a chain of ‘a friend of a friend in six steps or less,dubbed as the ‘six degrees of separation.In the world of pla
【机 构】
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College of Biology, Hunan University, Changsha 410082, China “,”Department of Molecular, Cell and De
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Any two people on Earth may be connected by a chain of ‘a friend of a friend in six steps or less,dubbed as the ‘six degrees of separation.In the world of plant systems,the degree of separation between the signaling ‘pathways of photoreceptor phytochromes and growth regulator phytohormones is smaller than previously expected,according to the recent studies.Plants control their growth by simultaneously sensing and responding to both the exteal environmental signals and the inteal developmental signals.Taking the well-studied light inhibition of hypocotyl elongation of young seedlings as an example,this response is controlled by both the red/far-red light receptor phytochromes and phytohormones,including auxin,cytokinins (CK),gibberellins (GA),brassinosteriods (BR),ethylene,and Abscisic acid (ABA).How phytochromes and phytohormones interact to control growth has been a subject of plant physiology studies for decades (Neff et al.,2006),and it appears to be a favored subject for the systems biology studies nowadays.
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