| 丛枝菌根真菌共生对石漠化生境白枪杆生长及光合特性的影响 |
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| 引用本文： | 杨波,王邵军,赵爽,张路路,张昆凤,樊宇翔,解玲玲,王郑均,郭志鹏,肖博.丛枝菌根真菌共生对石漠化生境白枪杆生长及光合特性的影响[J].浙江农林大学学报,2022,39(5):1028-1036. |
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| 作者姓名： | 杨波 王邵军 赵爽 张路路 张昆凤 樊宇翔 解玲玲 王郑均 郭志鹏 肖博 |
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| 作者单位： | 西南林业大学 生态与环境学院，云南 昆明 650224 |
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| 基金项目： | 国家自然科学基金资助项目(32060281，31660191)；云南省教育厅科学研究基金资助项目(2018Y129) |
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| 摘 要： | 目的 探究石漠化生境丛枝菌根真菌共生对白枪杆Fraxinus malacophylla生长及光合特征的影响，为植被恢复选取优势菌种提供参考。 方法 设置摩西斗管囊霉Funneliformis mosseae+农林生物肥(MN)、幼套近明球囊霉Claroideoglomus etunicatum+农林生物肥(YN)、根内根孢囊霉Rhizophagus intraradices+农林生物肥(GN)、农林生物肥(ck)共4个处理，测定不同处理下白枪杆生长(树高、胸径、根和叶生物量、叶面积、叶片色素及叶绿素)及光合特征(净光合速率、气孔导度、胞间二氧化碳摩尔分数、蒸腾速率、水分利用效率等)的变化。 结果 ①接种丛枝菌根真菌显著促进了白枪杆的生长与叶、根生物量积累(P＜0.05)。②接种摩西斗管囊霉和根内根孢囊霉显著提高了白枪杆叶绿素a、叶绿素b、叶黄素的相对含量(P＜0.05)，提升率达6%~67%。③接种丛枝菌根真菌显著提高了白枪杆的净光合速率、气孔导度、蒸腾速率与水分利用效率(P＜0.05)，显著降低了胞间二氧化碳摩尔分数(P＜0.05)。④主成分分析表明:气孔导度、树高、叶黄素是提高净光合速率的主控因子，平均贡献率达45.81%，叶绿素b、生物量和总叶绿素的影响次之。 结论 丛枝菌根真菌共生主要通过促进植株生长、光合色素含量，显著提高白枪杆净光合速率，其中摩西斗管囊霉为最优菌种。图5表2参33
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| 关 键 词： | 石漠化 丛枝真菌 白枪杆 生物量 叶绿素 光合参数 |
| 收稿时间： | 2021-11-10 |
Effects of arbuscular mycorrhizal fungi symbiosis on growth and photosynthetic characteristics of Fraxinus malacophylla in rocky desertification habitats |
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| YANG Bo,WANG Shaojun,ZHAO Shuang,ZHANG Lulu,ZHANG Kunfeng,FAN Yuxiang,XIE Lingling,WANG Zhengjun,GUO Zhipeng,XIAO Bo.Effects of arbuscular mycorrhizal fungi symbiosis on growth and photosynthetic characteristics of Fraxinus malacophylla in rocky desertification habitats[J].Journal of Zhejiang A&F University,2022,39(5):1028-1036. |
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| Authors: | YANG Bo WANG Shaojun ZHAO Shuang ZHANG Lulu ZHANG Kunfeng FAN Yuxiang XIE Lingling WANG Zhengjun GUO Zhipeng XIAO Bo |
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| Institution: | College of Ecology and Environment, Southwest Forestry University, Kunming 650224, Yunnan, China |
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| Abstract: | Objective This study aims to explore the effects of arbuscular mycorrhizal (AM) fungal symbiosis on growth and photosynthetic characteristics of Fraxinus malacophylla in rocky desertification habitats, so as to provide data reference for selecting dominant AM fungal species for vegetation restoration. Method An experiment was designed with four treatments: Funneliformis mosseae+agroforestry biofertilizer (MN), Claroideoglomus etunicatum+agroforestry biofertilizer (YN), Rhizophagus intraradices+agroforestry biofertilizer (GN) and agroforestry biofertilizer (ck). The changes in F. malacophylla growth (tree height, diameter at breast height, leaf and root biomass, leaf area, leaf pigment and chlorophyll) and photosynthetic characteristics (net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate, and leaf water use efficiency, etc.) were measured under different treatments. Result (1) Inoculation with AM fungi significantly promoted the growth of F. malacophylla and biomass accumulation of leaf and root(P＜0.05). (2) Inoculation with MN and GN significantly increased the relative contents of chlorophyll a, chlorophyll b and lutein in plant leaves (P＜0.05), and the increase rate was 6%?67%. (3) Inoculation with AM fungi significantly increased the net photosynthetic rate, stomatal conductance, transpiration rate, and water use efficiency of F. malacophylla (P＜0.05), but significantly decreased the intercellular CO2 concentration (P＜0.05). (4) Principal component analysis indicated that the stomatal conductance, tree height, and lutein were the key factors to increase the net photosynthetic rate, with an average contribution rate of 45.81%, followed by chlorophyll b, biomass and total chlorophyll. Conclusion AM fungal symbiosis can significantly improve the net photosynthetic rate of F. malacophylla by promoting plant growth and photosynthetic pigment content. The optimal strain is F. mosseae. Ch, 5 fig. 2 tab. 33 ref.] |
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