Key Laboratory of National Forestry and Grassland Administration on Forest Ecosystem Protection and Restoration of Poyang Lake Watershed, Jiangxi Agricultural University, Nanchang 330045, China; Jiangxi Provincial Key Laboratory of Silviculture, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China.
Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang 330045, China.
Sci Total Environ. 2024 Dec 10;955:176960. doi: 10.1016/j.scitotenv.2024.176960. Epub 2024 Oct 22.
Drought is a serious threat to crop productivity and global food security. About 40 % of the worldwide land is considered arid dryland soil because of a lack of rainfall, high solar radiation, and temperature fluctuations. Though rhizobacteria, particularly mycorrhizal fungi (MF), assist plants in coping with drought stress, an intensive quantitative assessment of their effects on plant growth and nutrient availability is still limited. We systematically carried out a global meta-analysis using 122 peer-reviewed publications comprising 3534 observations to investigate the effects of MF on plant biomass (PB) and nutrient availability (nitrogen: N and phosphorus: P) under drought-stress conditions. The results show that the MF inoculation significantly increased mycorrhizal colonization (MC), N and P uptakes, and plant biomass (PB) at a C:N ratio > 15 by 2171.44 %, 23.74 %, 135.61 %, and 220.91 %, respectively. The MF species Claroideoglomus etunicatum and Glomus significantly influenced the MC, N, and PB concentrations by 2541.68 %, 40.35 %, and 110.85 %, respectively. Moreover, the concentrations of MC, N, and PB were considerably affected by the soil texture categories, with the maximum levels of 4940.04 %, 127.05 %, and 84.04 % found in sandy, clay, and clay loam soils, respectively. In addition, soil pH, crop types, soil textural class, and MF species were identified as vital pedologic factors affecting plant growth and nutrient availability during fungal inoculation. Overall, this meta-analysis addresses gaps in understanding the effects of MF inoculation on plant development and nutrient availability under drought stress.
干旱是对作物生产力和全球粮食安全的严重威胁。由于降雨量不足、太阳辐射高和温度波动，全球约有 40%的土地被认为是干旱旱地土壤。尽管根际细菌，特别是菌根真菌 (MF)，有助于植物应对干旱胁迫，但对它们对植物生长和养分供应的影响进行集中定量评估仍然有限。我们系统地进行了一项全球荟萃分析，使用 122 篇经过同行评审的出版物，其中包含 3534 个观测结果，以调查在干旱胁迫条件下 MF 对植物生物量 (PB) 和养分供应 (氮：N 和磷：P) 的影响。结果表明，MF 接种显著增加了菌根定殖 (MC)、N 和 P 的吸收以及植物生物量 (PB)，在 C:N 比> 15 时分别增加了 2171.44%、23.74%、135.61%和 220.91%。MF 物种 Claroideoglomus etunicatum 和 Glomus 通过 2541.68%、40.35%和 110.85%分别显著影响 MC、N 和 PB 浓度。此外，MC、N 和 PB 的浓度受到土壤质地类别的极大影响，在沙质、粘质和粘壤土中分别达到最大值 4940.04%、127.05%和 84.04%。此外，土壤 pH、作物类型、土壤质地类别和 MF 物种被确定为在真菌接种过程中影响植物生长和养分供应的重要土壤因素。总体而言，这项荟萃分析解决了在理解 MF 接种对干旱胁迫下植物发育和养分供应的影响方面的差距。
