Phototropism of thalli and rhizoids developed from the thallus segments of Bryopsis hypnoides Lamouroux

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	Phototropism of thalli and rhizoids developed from the thallus segments of Bryopsis hypnoides Lamouroux
	Ye, NH ; Wang, HX ; Wang, GC ; Gao, ZQ ; Li, DM
	2006-06-01
发表期刊	JOURNAL OF INTEGRATIVE PLANT BIOLOGY
卷号	48 期号:6 页码:686-691
文章类型	Article
摘要	Newly regenerated thalli were used to study the phototropism of Bryopsis hypnoides Lamouroux under different qualities of light. Positive phototropism in the thalli and negative phototropism in the rhizoids of B. hypnoides were investigated and analyzed in terms of bending. Both thalli and rhizoids developed from thallus segments exhibited typical tip growth, and their photoreceptive sites for phototropism were also restricted to the apical hemisphere. The bending curvature of rhizoids and thalli were determined with unilateral lights at various wavelengths and different fluence rates after a fixed duration of illumination. The trends of bending from the rhizoid and thallus were coincident, which showed that the action spectrum had a large range, from ultraviolet radiation (366.5 nm) to green light (524 nm). Based on the bending curvatures, blue light had the highest efficiency, while the efficiency of longer wavelengths (> 500 nm) was significantly lower. External Ca2+ had no effect on the bending curvature of thalli and rhizoids. Blue light (440 nm) induced thallus branching from rhizoids, while red light (650 nm) had no such effect. Fast-occurring chloroplast accumulation in the outermost cytoplasmic layer of the blue light (440 nm)-irradiated region in the rhizoid was observed, from which protrusions (new thalli) arose after 4 h of the onset of illumination, and this action was thought to be driven by the dynamics of actin microfilaments.
关键词	Bryopsis Hypnoides Chloroplast Accumulation Phototropism Rhizoid Thallus
收录类别	SCI
语种	英语
WOS记录号	WOS:000238104300009
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/32576
专题	实验海洋生物学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China 2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China 3.Shandong Univ Technol, Sch Life Sci, Zibo 255049, Peoples R China
推荐引用方式 GB/T 7714	Ye, NH,Wang, HX,Wang, GC,et al. Phototropism of thalli and rhizoids developed from the thallus segments of Bryopsis hypnoides Lamouroux[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2006,48(6):686-691.
APA	Ye, NH,Wang, HX,Wang, GC,Gao, ZQ,&Li, DM.(2006).Phototropism of thalli and rhizoids developed from the thallus segments of Bryopsis hypnoides Lamouroux.JOURNAL OF INTEGRATIVE PLANT BIOLOGY,48(6),686-691.
MLA	Ye, NH,et al."Phototropism of thalli and rhizoids developed from the thallus segments of Bryopsis hypnoides Lamouroux".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 48.6(2006):686-691.

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