| 田玉杰,田旭,郭玉琳,吴凤婵,席培宇,李安定.中微量元素胁迫条件下西番莲幼苗光合生理特征[J].中国南方果树,2025,54(5): |
| 中微量元素胁迫条件下西番莲幼苗光合生理特征 |
| Photosynthetic Physiological Characteristics of Passion Fruit Seedlings Under Stress of Medium and Trace Elements |
| 投稿时间：2024-05-28 修订日期：2024-09-01 |
| DOI： |
| 中文关键词: 西番莲 中微量元素 光合效率 叶绿素含量 |
| 英文关键词:Passion fruit Medium and trace elements Photosynthetic efficiency Chlorophyll content |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 研究西番莲幼苗在中微量元素缺素条件下的光合生理参数变化，进一步探索中微量元素缺素条件下西番莲的光响应机制。本研究以黄果 ‘钦蜜9号’、紫果‘台农1号’为研究对象，采用盆栽试验，设置全素（CK）、缺硼(-B)、缺钙(-Ca)、缺镁(-Mg)、缺锌(-Zn)处理，对叶片叶绿素含量、净光合速率、电子传递效率等指标进行测定。结果表明，（1）缺素处理均提高了西番莲幼苗叶片的胞间CO2浓度，降低了水分利用效率，缺Zn处理的‘钦蜜9号’幼苗叶片净光合速率、气孔导度和蒸腾速率较 CK 均降低，西番莲对其他缺素处理的净光合速率、蒸腾速率、电子传递效率差异较大；缺素处理的西番莲叶绿素a含量、叶绿素总含量均显著降低；（2）经过相关性分析发现气孔导度与蒸腾速率间，水分利用效率与叶绿素a、叶绿素a+b含量间呈显著正相关性；主成分分析发现缺素处理对‘钦蜜9号’光合生理参数的影响排序为缺Zn＞缺Ca＞缺B＞缺Mg；缺素处理对‘台农1号’光合生理参数的影响排序为缺B＞缺Zn＞缺Mg＞缺Ca。结果表明Zn的缺失对西番莲幼苗的生长影响较大，任一元素缺失均会抑制百香果幼苗的光能利用能力和光合响应机制。 |
| 英文摘要: |
| Study the changes in photosynthetic physiological parameters of passion fruit seedlings under conditions of medium and trace element deficiency, and further explore the light response mechanism of passion fruit under conditions of medium and trace element deficiency. This study takes Huangguo 'Qinmi 9' and Ziguo 'Tainong 1' as research objects, and uses pot experiments to set up treatments of total nutrient (CK), boron deficiency (- B), calcium deficiency (- Ca), magnesium deficiency (- Mg), and zinc deficiency (- Zn) to measure indicators such as leaf chlorophyll content, net photosynthetic rate, and electron transfer efficiency. The results showed that (1) nutrient deficiency treatment increased the intercellular CO2 concentration in the leaves of passion fruit seedlings, reduced water use efficiency, and reduced the net photosynthetic rate, stomatal conductance, and transpiration rate of 'Qinmi 9' seedlings treated with Zn deficiency compared to CK. There were significant differences in net photosynthetic rate, transpiration rate, and electron transfer efficiency of passion fruit compared to other nutrient deficiency treatments; The chlorophyll a content and total chlorophyll content of passion fruit treated with nutrient deficiency were significantly reduced; (2) Through correlation analysis, it was found that there is a significant positive correlation between stomatal conductance and transpiration rate, as well as between water use efficiency and chlorophyll a and chlorophyll a+b content; Principal component analysis revealed that the order of the effects of nutrient deficiency treatment on the photosynthetic physiological parameters of 'Qinmi 9' was Zn deficiency>Ca deficiency>B deficiency>Mg deficiency; The order of the effects of nutrient deficiency treatment on the photosynthetic physiological parameters of 'Tainong 1' is B deficiency>Zn deficiency>Mg deficiency>Ca deficiency. The results showed that the deficiency of Zn had a significant impact on the growth of passion fruit seedlings, and any element deficiency would inhibit the light energy utilization ability and photosynthetic response mechanism of passion fruit seedlings. |
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