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86 华 中 农 业 大 学 学 报 第 43 卷
生长和光合作用,从而提高植株的抗旱能力 [30] ,表明 (1):76-86.
干旱胁迫会使马铃薯内生放线菌富集,从而来改善 [4] MAHAJAN S,TUTEJA N.Cold, salinity and drought stress⁃
es:an overview[J].Archives of biochemistry and biophysics,
干旱胁迫对植株的伤害。然而,本研究还发现,干旱
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胁迫下变形菌门菌株相对丰度降低56.0%,拟杆菌门
[5] SCHAFLEITNER R,ROSALES R O G,GAUDIN A,et al.
菌株相对丰度增加了240.77%,目前还未曾有研究表
Capturing candidate drought tolerance traits in two native An⁃
明,这些菌门相对丰度的增加或减少是否会影响植 dean potato clones by transcription profiling of field grown
株对干旱胁迫的响应,其他差异显著的细菌也有待 plants under water stress[J/OL]. Plant physiol biochem,
于进一步研究。在本研究中,Shannon 指数正常浇水 2007,45(9):673-690.
[6] ADMASSIEA M,WOLDEHAWARIATB Y,ALEMU T,
下(4.36)低于干旱处理下的(9.72),说明正常浇水处
et al.The role of plant growth-promoting bacteria in alleviating
理下马铃薯叶片内生细菌的丰富度低于干旱处理;
drought stress on pepper plants[J/OL]. Agricultural water
Simpson 指数正常浇水下(0.60)低于干旱处理下的
management,2022,272(1):107831[2022-09-23]. https://
(1.00),说明干旱处理下马铃薯叶片内生细菌的优势 doi.org/10.1016/j.agwat.2022.107831.
种集中度高于正常浇水处理。 [7] SOOD G,KAUSHAL R,SHARMA M. Alleviation of
伯克霍尔德氏菌 PsJN(Burkholderia pltofians) drought stress in maize (Zea mays L.) by using endogenous
PsJN 是从洋葱根部分离出的一种内生细菌,在提高 endophyte Bacillus subtilis in North West Himalayas[J].Soil
& plant science,2020,70(5):361-370.
宿主植物对生物和非生物胁迫的耐受性中发挥着重
[8] LAROUSSE M,RANCUREL C,SYSKA C,et al. Tomato
要作用。Yang 等 [31] 发现伯克霍尔德氏菌 PsJN 可以
root microbiota and Phytophthora parasitica-associated disease
在盐胁迫下刺激藜麦的生长和提高产量。将伯克霍 [J/OL].Microbiome,2017,5:56[2022-09-23]. https://doi.
尔德氏菌接种于干旱胁迫下的马铃薯植株中时,其 org/10.1186/s40168-017-0273-7.
细胞内部环境稳定、转录调控和活性氧伤害中所用 [9] BECKERS B,BEEK M O D,WEYENS N, et al.Structur⁃
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endosphere bacterial microbiome of field-grown poplar trees
克霍尔德氏菌 PsJN 同科的内生细菌伯克霍尔德氏
[J/OL]. Microbiome,2017,5:25[2022-09-23]. https://doi.
科(Burkholderiaceae),且该菌科的相对丰度在干旱
org/10.1186/s40168-017-0241-2.
胁迫下增加了 139.09%,由此可以推测,马铃薯内生
[10] HASSAN S E D.Plant growth-promoting activities for bacte⁃
伯克霍尔德氏科菌是马铃薯形成干旱防御机制的重 rial and fungal endophytes isolated from medicinal plant of
要因素,该菌可能在马铃薯植株应对干旱胁迫中发 Teucrium polium L.[J].Journal of advanced research,2017,8
挥着重要作用,是未来利用内生菌缓解马铃薯干旱 (6):687-695.
胁迫的重要材料。 [11] SINGH M,KUMAR A,SINGH R,et al. Endophytic bacte⁃
ria: a new source of bioactive compounds[J/OL]. Biotech,
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