干旱胁迫下不同浓度水杨酸对酿酒葡萄光合能力及抗旱水平的影响

发布时间：2018-05-04 22:37

本文选题：酿酒葡萄 + 干旱胁迫　；参考：《内蒙古农业大学》2017年硕士论文

【摘要】：本试验研究了干旱胁迫下不同浓度水杨酸对酿酒葡萄赤霞珠和梅鹿辄的生长状况、活性氧系统和光合作用的影响,探讨在干旱胁迫下水杨酸与酿酒葡萄生长状况、活性氧系统和光合作用的关系。试验主要结果如下:1.外施水杨酸对赤霞珠和梅鹿辄土壤含水量和生长量的影响不显著,对叶片的含水量和自由水含量有直接的影响。外施水杨酸后叶片含水量均高于对照,自由水含量均低于对照,且赤霞珠在2mmol/L浓度对于提高叶片含水量降低自由水含量效果最明显,梅鹿辄在3mmol/L浓度效果最为明显。2.水杨酸处理提高了赤霞珠和梅鹿辄活性氧系统。与喷施蒸馏水的对照组相比,外施水杨酸提高了渗透调节物质脯氨酸的含量,降低了丙二醛含量,还提升了植物组织的SOD和POD的活性。对于赤霞珠用2mmol/L浓度水杨酸喷施效果均最明显,而对于梅鹿辄以3mmol/L浓度处理最为明显。3.水杨酸处理提高了赤霞珠和梅鹿辄的光合能力。干旱胁迫下,水杨酸处理与喷施蒸馏水相比,喷施水杨酸赤霞珠和梅鹿辄叶绿素a、叶绿素b和类胡萝卜素降低速率减慢了,赤霞珠和梅鹿辄叶片的光合能力得到提升,净光合速率、蒸腾速率和气孔导度均得到显著的提升,喷施赤霞珠和梅鹿辄分别在2mmol/L和3mmol/L浓度最为显著。4.综合干旱胁迫下不同浓度水杨酸对赤霞珠和梅鹿辄的影响,水杨酸处理后赤霞珠和梅鹿辄的叶片含水量,活性氧系统与光合能力均比对照有显著的提高,提高了酿酒葡萄整体的抗旱性。不同浓度水杨酸对于赤霞珠和梅鹿辄的影响也不同,水杨酸浓度为2mmol/L对于赤霞珠效果最明显,在水杨酸浓度3mmol/L对梅鹿辄效果最明显。
[Abstract]:The effects of different concentrations of salicylic acid on the growth, active oxygen system and photosynthesis of Cabernet Sauvignon and Merlot in wine grape under drought stress were studied, and the growth status of salicylic acid and wine grape under drought stress was studied. The relationship between reactive oxygen species system and photosynthesis. The main results of the experiment are as follows: 1. Application of salicylic acid had no significant effect on soil water content and growth of Cabernet Sauvignon and Merlot, but had direct effect on leaf water content and free water content. The leaf water content was higher and free water content was lower than the control after the application of salicylic acid, and Cabernet Sauvignon had the most obvious effect on increasing leaf water content and reducing free water content at 2mmol/L concentration, and Merlot had the most obvious effect at 3mmol/L concentration. Salicylic acid treatment improved the active oxygen species system of Cabernet Sauvignon and Merlot. Compared with the control group sprayed with distilled water, exogenous salicylic acid increased the content of proline, decreased the content of malondialdehyde, and increased the activities of SOD and POD in plant tissues. The effect of salicylic acid spraying on Cabernet Sauvignon with 2mmol/L concentration was the most obvious, while that of Merlot with 3mmol/L concentration was the most obvious. Salicylic acid treatment increased the photosynthetic capacity of Cabernet Sauvignon and Merlot. Under drought stress, salicylic acid treatment decreased the rate of chlorophyll a, chlorophyll b and carotenoid of Cabernet Sauvignon and Merlot by spraying distilled water, and the photosynthetic ability of leaves of Cabernet Sauvignon and Merlot was improved. The net photosynthetic rate, transpiration rate and stomatal conductance were significantly increased, and Cabernet Sauvignon and Merlot were sprayed at the concentration of 2mmol/L and 3mmol/L respectively. The effects of different concentrations of salicylic acid on Cabernet Sauvignon and Merlot were studied. The leaf water content, active oxygen system and photosynthetic capacity of Cabernet Sauvignon and Merlot were significantly increased after salicylic acid treatment. Improved the overall drought resistance of wine grape. The effects of salicylic acid on Cabernet Sauvignon and Merlot were also different. The effect of salicylic acid on Cabernet Sauvignon was the most obvious when the concentration of salicylic acid was 2mmol/L, and the effect on Merlot was the most obvious at the concentration of salicylic acid 3mmol/L.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S663.1

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