Salt Tolerance and Sodium Transport in Freshwater and Salt Tolerant Charophyte Algae

淡水和耐盐轮藻的耐盐性和钠运输

• 批准号: 9105582
• 负责人: Mary Bisson
• 金额: $ 24.21万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105582&HistoricalAwards=false
• 关键词: Salt; Tolerance; Sodium; Transport; Freshwater

The ability to tolerate saline conditions is a variable and complex trait in plants. Salinity tolerance includes the ability to respond to osmotic stress and resistance to toxicity of individual ions. These traits are significant in determining the natural distribution of plants, and are important in agriculture, because salinity may limit productivity, especially in irrigated soils. The study will be done on Charophytes, complex macrophytic algae closely related to the line which gave rise to higher plants. These algae have large internodal cells, permitting experimental manipulations not possible in other plants. Two closely related species, Chara corallina, an obligate freshwater species, and C. buckellii, a species collected from a salt lake which can be cultured in fresh or salt water will be studied. The two species differ in their ability to regulate turgor and in their tolerance to sodium and magnesium. Dr. Bisson will study ion fluxes and the mechanism by which they occur in intact cells, cells with permeabilized plasmalemma, cells whose internal contents have been perfused away and replaced by controlled solutions, isolated vesicles of membrane, and patches of membrane. The aim is to elucidate the mechanism of movement and how this movement is controlled by environmental and cytoplasmic factors to confer resistance to salt toxicity.//

耐受盐水条件的能力是一个可变的和复杂的 植物的特征 耐盐性包括 个体对渗透胁迫的反应和对毒性的抵抗力 离子。 这些特征在决定自然的 植物的分布，并在农业中很重要，因为 盐度可能限制生产力，特别是在灌溉土壤中。 本研究将在轮藻，复杂的大型藻类， 与产生高等植物的品系密切相关。 这些藻类有大的节间细胞，允许实验 这是其他植物无法做到的。 两个密切相关 种、一种专性淡水种Chara corruga和C. buckellii，一种从盐湖采集的物种， 将研究在淡水或盐水中培养。 这两个物种 调节膨压的能力和耐受性不同 到钠和镁。 Bisson博士将研究离子流和 它们发生在完整细胞中的机制， 透化质膜，其内部内容物已被渗透的细胞， 灌注掉，用受控溶液代替，隔离 膜囊泡和膜补丁。 目的是 阐明运动的机制以及这种运动是如何 受环境和细胞质因素控制， 抗盐毒性。//