Investigation of Exogenous Benzyladenine on Growth, Biochemical Composition, Photosynthesis and Antioxidant Activity of Indian Sandalwood (Santalum album L.) Seedlings
Investigation of Exogenous Benzyladenine on Growth, Biochemical Composition, Photosynthesis and Antioxidant Activity of Indian Sandalwood (Santalum album L.) Seedlings
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外源苄基腺嘌呤对印度檀香幼苗生长、生化组成、光合作用及抗氧化活性的研究
DOI：
10.1007/s00344-018-9806-y
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发表时间：
2018-12-01
影响因子：
4.8
通讯作者：
Pan, Lijun
中科院分区：
文献类型：
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作者：
Liu, Xiaojin;Xu, Daping;Pan, Lijun
细胞分裂素在植物生长发育的许多方面起着重要作用。研究了苄基腺嘌呤（BA）对印度檀香（Santalum album L.）通过盆栽试验，研究了0、1、10和100 mgL（-1）BA浓度对组培苗生长、生化成分（蛋白质、糖、叶绿素和类胡萝卜素）、气体交换参数和氧化状态的影响。结果表明，BA的作用是双向的。1 mg L（-1）BA处理促进了茎的生长、冠幅和干物质积累，提高了苗木质量，提高了净光合速率和瞬时水分利用效率，促进了光合色素（叶绿素a、叶绿素B和类胡萝卜素）的积累。可溶性蛋白质和可溶性糖的含量也有所增加，但高度生长受到明显抑制。同时，大多数抗氧化酶（过氧化氢酶、过氧化物酶和超氧化物歧化酶）的活性也显著增强，从而极大地抑制了脂质过氧化。而10和100 mg L（-1）BA处理对地径、冠幅、生物量、品质指数、叶绿素a、叶绿素B含量和净光合速率无明显改善，但氧化状态加重，膜脂过氧化作用加剧。结果表明，BA是对S.结果表明，在育苗期叶面喷施1 mgL（-1）BA是提高苗木质量的最适宜浓度。
Cytokinins play essential roles in many aspects of plant growth and development. To study the effects of benzyladenine (BA) on growth and metabolism of Indian sandalwood (Santalum album L.) seedlings, the influences of BA concentrations of 0, 1, 10 and 100 mgL(-1) on growth, biochemical components (proteins, sugars, chlorophylls and carotenoids) and gas exchange parameters as well as oxidative status were investigated through a pot cultivation experiment. The results showed that BA acted in a biphasic manner. Treatment with BA at 1 mgL(-1) promoted stem growth, crown width and dry biomass accumulation, improved seedling quality, enhanced the net photosynthetic rate and instantaneous water use efficiency and stimulated photosynthetic pigment (chlorophyll a, chlorophyll b and carotenoid) accumulation greatly. Moreover, the contents of soluble proteins and sugars were also increased, but the height growth was inhibited considerably. Meanwhile, the activities of most antioxidant enzymes (catalase, peroxidase and superoxide dismutase) were also strengthened significantly, and therefore lipid peroxidation was inhibited greatly. In contrast, no significant improvement was observed on ground diameter, crown width, biomass, quality index, chlorophyll a content, chlorophyll b content or net photosynthetic rate when treated with 10 and 100 mgL(-1) BA, but the oxidative status was aggravated, as a result of which lipid peroxidation was intensified. The data proved that BA was one of the most active plant growth regulators on growth and metabolism of S. album seedlings, and suggested that leaf application of 1mgL(-1) BA was the most suitable concentration for enhancing seedling quality during the nursery period.