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

CORC > 海洋研究所 > 中国科学院海洋研究所 > 实验海洋生物学重点实验室

	Phototropism of thalli and rhizoids developed from the thallus segments of Bryopsis hypnoides Lamouroux
	Ye, NH ; Wang, HX ; Wang, GC ; Gao, ZQ ; Li, DM
刊名	JOURNAL OF INTEGRATIVE PLANT BIOLOGY
	2006-06-01
卷号	48 期号:6 页码:686-691
关键词	Bryopsis hypnoides chloroplast accumulation phototropism rhizoid thallus
英文摘要	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.
收录类别	SCI
语种	英语
WOS记录号	WOS:000238104300009
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/32576]
专题	海洋研究所_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.