意大利蝗越冬卵抗寒物质分析

意大利蝗Calliptamus italicus是新疆草原主要优势危害种,以滞育卵越冬.为弄清意大利蝗越冬卵发育及滞育过程的抗寒机制,本研究检测了自然条件下越冬卵的糖类、多元醇、脂肪和氨基酸等主要抗寒物质的含量变化,分析蝗卵发育过程不同阶段抗寒物质含量的变化趋势.结果表明,意大利蝗卵在越冬过程中,除脂肪含量无显著差异外...

Cold-resistant Substances in Overwintering Eggs of Calliptamus italicus (Orthoptera: Catantopidae)

Calliptamus italicus is a major dominant grass pest in Xinjiang and overwinters in the soil as diapause eggs. Cold-resistant mechanism of C. italicus eggs was investigated by measuring the contents of key cold-resistant substances such as sugars, alcohols, fat, and amino acids through the developmental process of C. italicus eggs under natural conditions and analyzing the variation trends of these cold-resistant substances. The results showed that during the overwintering of locust eggs, there was no significant variation in fat content. When the temperature was low, trehalose, glycerin, sorbitol, and amino acids were accumulated in eggs during diapause period, indicating that they are the main cold resistant substances and contribute to enhance the cold resistance of C. italicus eggs. Glycogen, glucose, fructose, and inositol provided energy for the development of locust eggs as energy substances, and these substances were transformed into each other in locust eggs. The results provide a basis for further study on the adaptation mechanism of C. italicus.