干旱区生态环境知识资源中心(Arid): 花期海蓬子对盐胁迫的生理响应

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	花期海蓬子对盐胁迫的生理响应
其他题名	Physiological responses of Salicornia bigelovii to salt stress during the flowering stage
	刘伟成 1; 郑春芳 1; 陈琛 1; 彭益全 2; 曾国权 1; 冀德伟 1; 陈少波 1; 谢起浪 1; 於俊琦 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2013
卷号	33 期号:17 页码:5184-5193
中文摘要	研究了花期阶段不同浓度NaCl(0、10、20、30、40、50和60 )对海蓬子(Salicornia bigelovii)生长、光合色素、光合作用参数、抗氧化和离子含量的影响。结果表明:10NaCl盐处理下海蓬子株高、茎生物量、叶绿素(Chl)含量、净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间CO_2浓度(Ci)、茎SOD活性和POD活性等指标值均显著高于其它处理,而高盐(40NaCl及其以上)胁迫下,上述指标值均表现为下降,同时茎K~+ 含量也显著下降,而茎Na~+、Cl~-、Na~+/K~+和MDA含量等显著上升。相关分析显示,生物量与Chl a/Chl b呈现显著正相关,与株高、茎Pn、Gs、Ci、Tr、Chl含量、K+ 含量、SOD和POD活性呈现极显著正相关,与气孔限制值(Ls)、Car/Chl、MDA含量、Cl~- 含量和Na~+/K~+ 等均呈极显著负相关。综上所述,10 NaCl处理是花期海蓬子生长和光合生长的最适宜盐度,而无盐和高盐下海蓬子光合抑制主要是来自气孔因素,同时高盐胁迫下还伴随着非气孔限制。
英文摘要	Soil salinity has become an important issue in agriculture. One of the most urgent global problems is to provide enough water and land to meet the world’s food needs. Sodium in soil adversely affects the growth and yield of most crop plants, as most crop species are highly sensitive to saline conditions. However, it is estimated that approximately 15% of undeveloped land in the world’s coastal and inland salt deserts would be suitable for growing crops using saltwater for irrigation. The idea of using seawater for crop production along coastal deserts has been proposed over the past 30 years. These alternative sources of water and land could be used for cultivation of specialized, salt-tolerant crops. Salicornia bigelovii, a plant that can be used to treat a variety of diseases, is one the most promising halophytes for cultivation in such areas. S. bigelovii is a leafless, fast-growing, annual succulent. It is one of the most salt-tolerant plants, and is capable of growing under highly saline conditions on salt marshes. Consequently, it is considered to be a promising crop for cultivation in subtropical coastal deserts. Unfortunately, high salinity and water scarcity still adversely affect the physiological functions of this plant. We investigated the effects of different concentrations of NaCl (0, 10, 20, 30, 40, 50, and 60) on growth, photosynthesis, chlorophyll and carotenoids contents, the contents of K~+ and Na+, and components of the antioxidant system of S. bigelovii during the flowering stage. The results showed that the values for plant height, shoot biomass, chlorophyll content, net photosynthetic rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO_2 concentration (Ci), and activities of peroxidase and superoxide dismutase in the shoot were much greater in plants in the 10 NaCl treatment than in those treated with higher concentrations of NaCl. Plant height and biomass were both significantly decreased in the 40-60 NaCl treatments. High NaCl stress resulted in decreased contents of chlorophyll and carotenoids, lower Pn, Gs, Tr, and Ci, decreased activities of superoxide dismutase and peroxidase, and lower K~+ content. High concentrations of NaCl increased the contents of malondialdehyde (a product of lipid peroxidation), Na~+, and Cl~-, and also markedly increased the Na+/K+ ratio. Correlation analysis indicated that the biomass of S. bigelovii during the flowering stage was significantly positively related to the chlorophyll a/b ratio, and was highly significantly positively related to plant height, Pn, Gs, Ci, Tr, chlorophyll content, K+ content, and superoxide dismutase and peroxidase activities in the shoot. In contrast, biomass was highly significantly negatively related to Ls, the carotenoids/chlorophyll ratio, malondialdehyde content, Cl- content, and the Na~+/K~+ ratio. In summary, S. bigelovii showed optimal growth in the 10 NaCl treatment. Stomatal inhibition was the main cause for the reduction in Pn of S. bigelovii in the no-salt and high-salt treatments, while both stomatal restriction and non-stomatal restriction occurred in the 60 NaCl treatment.
中文关键词	海蓬子 ; NaCl胁迫 ; 光合特性 ; 叶绿素 ; 离子吸收
英文关键词	Salicornia bigelovii NaCl stress photosynthetic characteristics chlorophyll ion absorption
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4933840
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230020
作者单位	1.浙江省海洋水产养殖研究所, 浙江省近岸水域生物资源开发与保护重点实验室, 温州, 浙江 325005, 中国; 2.南京农业大学资源与环境科学学院, 江苏省海洋生物学重点实验室, 南京, 江苏 210095, 中国
推荐引用方式 GB/T 7714	刘伟成,郑春芳,陈琛,等. 花期海蓬子对盐胁迫的生理响应[J],2013,33(17):5184-5193.
APA	刘伟成.,郑春芳.,陈琛.,彭益全.,曾国权.,...&於俊琦.(2013).花期海蓬子对盐胁迫的生理响应.生态学报,33(17),5184-5193.
MLA	刘伟成,et al."花期海蓬子对盐胁迫的生理响应".生态学报 33.17(2013):5184-5193.