| 徐伟杰,胡英雪,宫超,等.人工气候室条件下，番茄苗期对弱光的形态学和生理学研究[J].广东农业科学,2024,(12):- |
| Morphological and physiological study of tomato seedlings under weak light conditions in an artificial climate chamber |
| 投稿时间：2024-10-30 修订日期：2024-12-05 |
| DOI： |
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| 摘要点击次数: 73 |
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| Abstract: |
| 【Objective】As an important vegetable crop and model plant, tomato plays an important role in modern agriculture and scientific research. In the winter and spring seasons of southern China, there is a long period of cloudy and rainy weather, which leads to excessive growth of tomato plants. Therefore, exploring the effects of low light on tomato plant growth and physiological indicators, screening weak light tolerant materials, and providing a basis for cultivating low light tolerant tomato varieties. 【Method】To clarify the effects of low light on the growth and development of tomatoes and their mechanisms of low light tolerance, this study conducted research on plant growth indicators, chlorophyll content, chlorophyll fluorescence parameters, and antioxidant enzyme activity in the low light tolerant tomato inbred line 'GC303' and the low light sensitive inbred line 'LA2838' under artificial climate conditions, with 500 μ mol·m-2·s-1 light intensity as the control and 100 μ mol· m-2·s-1 light intensity as the low light treatment. 【Result】 Under weak light stress, the activities of SOD, CAT, and POD in the leaves of 'GC303' seedlings were significantly reduced compared to 'LA2838', while MDA showed no significant difference, indicating a stronger ability to clear peroxides; In terms of transcriptome, there were 1913 differentially expressed genes between 'GC303' and 'LA2838' during the seedling stage, including 987 up-regulated genes and 926 down regulated genes. The differentially expressed genes were significantly enriched in response to plant stress responses such as abiotic stress, chloroplast movement, metal ion transport, microtubule based movement, and photosynthetic pathways. 【Conclusion】 Under weak light stress, compared with low light tolerant tomato inbred lines, low light sensitive inbred lines have a greater impact on growth and photosynthetic parameters, but a smaller impact on chlorophyll and MDA content indicators. |
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