Effects of host starvation on the symbiotic dinoflagellates from the sea anemone Stichodactyla mertensii

doi:10.1111/j.1439-0485.2010.00405.x

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	Effects of host starvation on the symbiotic dinoflagellates from the sea anemone Stichodactyla mertensii
	Zhu, BaoHua 1,2; Pan, KeHou 2; Wang, GuangCe 1
	2011-03-01
发表期刊	MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE
ISSN	0173-9565
卷号	32 期号:1 页码:15-23
文章类型	Article
摘要	Many tropical cnidarians, including anemones and corals, contain symbiotic dinoflagellates known as zooxanthellae. Photosynthesis by symbiotic dinoflagellates benefits the animal host and the proficiency of host metabolism also plays an important role in the nutrient status of the photosynthetic dinoflagellates. We aimed to determine the responses of symbiotic dinoflagellates to host starvation. The ultrastructure and some physiological indicators of symbiotic dinoflagellates (Symbiodinium sp., zooxanthellae) were examined in starved sea anemones (Stichodactyla mertensii; 3-, 45- and 280-day starvation). The cell size of zooxanthellae was not affected by starving the host; however, the ultrastructure and other physiological indicators of the zooxanthellae were affected. The photochemical efficiency of symbiotic dinoflagellates from anemones after 280 days of starvation was significantly (P < 0.01) higher than that of symbiotic dinoflagellates from anemones after 3- and 45-day starvation. The number of symbiotic dinoflagellates from anemones decreased with increasing starvation duration. Generally, the chlorophyll a and c content of symbiotic dinoflagellates decreased significantly with longer anemone starvation. The tentacles of 3-day starved anemones contained the most zooxanthellae, some of which were dividing and still enclosed within one periplast, and some had split entirely within one host vacuole. Moreover, each cell from 3-day starved anemone contained up to five or six more mitochondria than those from 45- to 280-day starved anemones. More lipid granules appeared in the zooxanthellae from 45-to 280-day starved anemones. Pyrenoids, lobed accumulation bodies and calcium oxalate crystals existed in the symbiotic dinoflagellates from anemones at different starvation stages, which suggested that their existence had no correlation with host starvation. These findings contribute to an improved mechanistic understanding of the symbiotic relationship between zooxanthellae and anemones.; Many tropical cnidarians, including anemones and corals, contain symbiotic dinoflagellates known as zooxanthellae. Photosynthesis by symbiotic dinoflagellates benefits the animal host and the proficiency of host metabolism also plays an important role in the nutrient status of the photosynthetic dinoflagellates. We aimed to determine the responses of symbiotic dinoflagellates to host starvation. The ultrastructure and some physiological indicators of symbiotic dinoflagellates (Symbiodinium sp., zooxanthellae) were examined in starved sea anemones (Stichodactyla mertensii; 3-, 45- and 280-day starvation). The cell size of zooxanthellae was not affected by starving the host; however, the ultrastructure and other physiological indicators of the zooxanthellae were affected. The photochemical efficiency of symbiotic dinoflagellates from anemones after 280 days of starvation was significantly (P < 0.01) higher than that of symbiotic dinoflagellates from anemones after 3- and 45-day starvation. The number of symbiotic dinoflagellates from anemones decreased with increasing starvation duration. Generally, the chlorophyll a and c content of symbiotic dinoflagellates decreased significantly with longer anemone starvation. The tentacles of 3-day starved anemones contained the most zooxanthellae, some of which were dividing and still enclosed within one periplast, and some had split entirely within one host vacuole. Moreover, each cell from 3-day starved anemone contained up to five or six more mitochondria than those from 45- to 280-day starved anemones. More lipid granules appeared in the zooxanthellae from 45-to 280-day starved anemones. Pyrenoids, lobed accumulation bodies and calcium oxalate crystals existed in the symbiotic dinoflagellates from anemones at different starvation stages, which suggested that their existence had no correlation with host starvation. These findings contribute to an improved mechanistic understanding of the symbiotic relationship between zooxanthellae and anemones.
关键词	Host Starvation Physiological Indicators Sea Anemone Stichodactyla Mertensii Symbiotic Dinoflagellates
学科领域	Marine & Freshwater Biology
DOI	10.1111/j.1439-0485.2010.00405.x
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000286836800003
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/337002/11851
专题	实验海洋生物学重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Expt Marine Biol, Inst Oceanol, Qingdao 266071, Peoples R China 2.Ocean Univ China, Key Lab Mariculture, Minist Educ, Qingdao, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhu, BaoHua,Pan, KeHou,Wang, GuangCe. Effects of host starvation on the symbiotic dinoflagellates from the sea anemone Stichodactyla mertensii[J]. MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE,2011,32(1):15-23.
APA	Zhu, BaoHua,Pan, KeHou,&Wang, GuangCe.(2011).Effects of host starvation on the symbiotic dinoflagellates from the sea anemone Stichodactyla mertensii.MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE,32(1),15-23.
MLA	Zhu, BaoHua,et al."Effects of host starvation on the symbiotic dinoflagellates from the sea anemone Stichodactyla mertensii".MARINE ECOLOGY-AN EVOLUTIONARY PERSPECTIVE 32.1(2011):15-23.

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