| 赵美兰,金龙飞,岳 杨,王文静,张德健,王 鹏.木霉对盐胁迫下枸头橙种子萌芽率及幼苗生长生理影响[J].中国南方果树,2026,55(1): |
| 木霉对盐胁迫下枸头橙种子萌芽率及幼苗生长生理影响 |
| Effects of Trichoderma on seed germination rate and seedling growth physiology of Lycium cycnides under salt stress |
| 投稿时间：2024-12-04 修订日期：2024-12-30 |
| DOI： |
| 中文关键词: 木霉 盐胁迫 柑橘 种子萌发 抗氧化酶 |
| 英文关键词:Trichoderma salt stress Citrus seed germination Antioxidant enzymes |
| 基金项目:浙江省基础公益研究计划项目LTGN23C150001；黄岩区院地合作项目(黄岩蜜橘优质轻简栽培技术研究与示范)。 |
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| 中文摘要: |
| 盐害是制约柑橘产量和品质提升的主要非生物胁迫之一。为了研究木霉与柑橘互作应答盐胁迫的机制，本文以柑橘砧木枸头橙（Citrus aurantium L.‘Goutou’ Sour Orange）为试验材料，研究在盐胁迫下哈茨木霉（Trichoderma harziauum）对柑橘种子萌发和幼苗生长生理的影响。研究结果表明，正常条件下接种木霉能提高柑橘种子的萌芽率，促进幼苗的生长，接种哈茨木霉的柑橘种子萌芽率，幼苗的株高、茎粗、总根长、根表面积、根体积和干鲜重等都显著高于对照。盐胁迫下，柑橘种子的萌芽率和幼苗生长指标均显著降低，接种木霉能够有效缓解50 mmol/L盐胁迫对柑橘种子萌芽率和幼苗生长的抑制。50 mmol/L盐胁迫下，接种哈茨木霉柑橘幼苗的株高、茎粗、总鲜重、总干重、总根长、根系投影面积、根表面积、根体积显著高于未接种的；50 mmol/L和100 mmol/L盐胁迫下哈茨木霉增加了柑橘幼苗叶片的叶绿素、可溶性糖、可溶性蛋白和脯氨酸的含量，同时提高了叶片超氧化物歧化酶、过氧化物酶、氧化氢酶活性，降低了丙二醛的含量。综上所述，接种哈茨木霉能提高50 mmol/L种子的萌芽率，促进幼苗生长；而且提高了50 mmol/L盐胁迫下柑橘抗氧化酶活性和渗透调节物质含量，从而达到缓解盐胁迫的作用。 |
| 英文摘要: |
| Salinity is one of the main abiotic stresses restricting the yield and quality improvement of citrus. In order to study the mechanism of Trichoderma and citrus interaction in response to salt stress, Citrus aurantium L. 'Goutou' Sour Orange was used as the experimental material to study the effects of Trichoderma harziauum on citrus seed germination and seedling growth physiology under salt stress. The results showed that Trichoderma inoculation could improve the germination rate of citrus seeds and promote the growth of seedlings under normal conditions, and the germination rate of citrus seeds inoculated with Trichoderma harzianum was significantly higher than that of the control. Under salt stress, the germination rate and seedling growth indexes of citrus seeds were signif-icantly reduced, and Trichoderma inoculation could effectively alleviate the inhibition of 50 mmol/L salt stress on citrus seed germination rate and seedling growth. Under 50 mmol/L salt stress, the plant height, stem diameter, total fresh weight, total dry weight, total root length, root projection area, root surface area and root volume of the inoculated Trichoderma harzianum citrus seedlings were significantly higher than those without inoculation. Under 50 mmol/L and 100 mmol/L salt stresses, Trichoderma harzianum increased the contents of chlorophyll, soluble sugar, soluble protein and proline in citrus seedling leaves, increased the activities of superoxide dis-mutase, peroxidase and catalase in leaves, and decreased the content of malondialdehyde. In conclusion, vaccina-tion with Trichoderma harzianum could increase the germination rate of 50 mmol/L seeds and promote the growth of seedlings. Moreover, the activity of antioxidant enzymes and the content of osmotic regulators in citrus under 50 mmol/L salt stress were increased, so as to alleviate salt stress. |
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