Liang Xinyan, Chen Lin, Lan Xiaoying, Liao Guangrong, Feng Ling, Li Jitong, Fan Wenyan, Wang Shuang, Liu Jinglan
College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
Joint International Research Laboratory of Agriculture and AgriProduct Safety of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.
Insects. 2022 Apr 5;13(4):355. doi: 10.3390/insects13040355.
Drought stress greatly impacts insect development and population growth. Some studies have demonstrated increased reproductive capacity in drought-stressed insects; however, physiological changes in the brown planthopper (BPH), (Stål), during periods of drought are unclear. In this study, BPH fed on drought- stressed rice had lower population numbers than BPH feeding on non-stressed rice. Water content, osmotic pressure of hemolymph and total amino acid content of BPH were significantly lower when BPH fed on drought-stressed rice compared to the non-stressed control; however, glucose content and glutathione S-transferase (GST) activity were significantly higher in BPH fed on drought-stressed rice. The expression of and in BPH fed on drought-stressed rice was higher than that in BPH feeding on non-stressed control plants. The size of myofibrils and the abundance of mitochondria in BPH flight muscles were significantly lower in BPH fed on drought-stressed rice compared to non-stressed plants. These results indicate that water management impacts the physiology of BPH, which may be useful in understanding the relationship between drought stress and this damaging herbivore.
干旱胁迫对昆虫发育和种群增长有很大影响。一些研究表明，处于干旱胁迫下的昆虫繁殖能力增强；然而，褐飞虱（Nilaparvata lugens (Stål)）在干旱时期的生理变化尚不清楚。在本研究中，取食受干旱胁迫水稻的褐飞虱种群数量低于取食未受胁迫水稻的褐飞虱。与未受胁迫的对照相比，取食受干旱胁迫水稻的褐飞虱其含水量、血淋巴渗透压和总氨基酸含量显著降低；然而，取食受干旱胁迫水稻的褐飞虱其葡萄糖含量和谷胱甘肽S-转移酶（GST）活性显著更高。取食受干旱胁迫水稻的褐飞虱中[具体基因名称缺失]和[具体基因名称缺失]的表达高于取食未受胁迫对照植株的褐飞虱。与未受胁迫植株相比，取食受干旱胁迫水稻的褐飞虱飞行肌中肌原纤维大小和线粒体丰度显著更低。这些结果表明，水分管理会影响褐飞虱的生理，这可能有助于理解干旱胁迫与这种有害食草动物之间的关系。
