Yuan Yong-Ge, Gao Fang-Lei, Yu Fei-Hai, Li Jun-Min, Li Mai-He
School of Advanced Study, Taizhou University, Taizhou, China.
Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China.
Front Plant Sci. 2023 May 9;14:1177154. doi: 10.3389/fpls.2023.1177154. eCollection 2023.
Parasitic plants can damage crop plants and consequently cause yield losses and thus threaten food security. Resource availability (e.g., phosphorus, water) has an important role in the response of crop plants to biotic attacks. However, how the growth of crop plants under parasitism are affected by environmental resource fluctuation is poorly understood.
We conducted a pot experiment to test the effects of the intensity of parasitism and the availability of water and phosphorus (P) on soybean shoot and root biomass.
We found that low-intensity parasitism caused ~6% biomass reduction, while high-intensity parasitism caused ~26% biomass reduction in soybean. Under 5-15% water holding capacity (WHC), the deleterious effect of parasitism on soybean hosts was ~60% and ~115% higher than that under 45-55% WHC and 85-95% WHC, respectively. When the P supply was 0 μM, the deleterious effect of parasitism on soybean was 67% lower than that when the P supply was 20 μM. Besides, the biomass of was highest when both the water and the P availability were lowest. caused the highest damage to soybean hosts under 5 μM P supply, 5-15% WHC, and high-intensity parasitism. Additionally, biomass was significantly and negatively related to the deleterious effect of parasitism on soybean hosts and to the total biomass of soybean hosts under high-intensity parasitism, but not under low-intensity parasitism. Although high resource availability can promote soybean growth, the two resources have different impacts on the response of hosts to parasitism. Higher P availability decreased host tolerance to parasites, while higher water availability increased host tolerance. These results indicate that crop management, specifically water and phosphorus supply, can efficiently control in soybean. To our best knowledge, this appears to be the first study to test the interactive effect of different resources on the growth and response of host plants under parasitism.
寄生植物会损害农作物，进而导致产量损失，从而威胁粮食安全。资源可用性（如磷、水）在农作物对生物攻击的响应中起着重要作用。然而，寄生状态下农作物的生长如何受到环境资源波动的影响却鲜为人知。
我们进行了一项盆栽试验，以测试寄生强度以及水和磷（P）的可用性对大豆地上部和根部生物量的影响。
我们发现，低强度寄生使大豆生物量减少约6%，而高强度寄生使大豆生物量减少约26%。在持水量（WHC）为5 - 15%时，寄生对大豆寄主的有害影响分别比在WHC为45 - 55%和85 - 95%时高约60%和115%。当磷供应为0 μM时，寄生对大豆的有害影响比磷供应为20 μM时低67%。此外，当水和磷的可用性都最低时，（此处原文缺失相关主体，无法准确翻译）的生物量最高。在磷供应为5 μM、WHC为5 - 15%且寄生强度高的情况下，（此处原文缺失相关主体，无法准确翻译）对大豆寄主造成的损害最大。此外，在高强度寄生而非低强度寄生下，（此处原文缺失相关主体，无法准确翻译）生物量与寄生对大豆寄主的有害影响以及大豆寄主的总生物量显著负相关。虽然高资源可用性可促进大豆生长，但这两种资源对寄主对寄生反应的影响不同。较高的磷可用性降低了寄主对寄生虫的耐受性，而较高的水可用性则提高了寄主的耐受性。这些结果表明，作物管理，特别是水和磷的供应，可以有效控制大豆中的（此处原文缺失相关主体，无法准确翻译）。据我们所知，这似乎是第一项测试不同资源对寄生状态下寄主植物生长和反应的交互作用的研究。
