Gao Qinghai, Wu Yan, Xu Kun, Gao Huiyuan
Shandong Agricultural University, Tai ' an 271018, China.
Ying Yong Sheng Tai Xue Bao. 2006 Mar;17(3):390-4.
The study on the changes of physiological and biochemical properties of grafted eggplant seedling roots under low temperature stress and the relationships between these changes and cold tolerance showed that at the initial stage of treating with 10 degrees C (daytime) /3 degrees C (night), eggplant seedling roots were most impressible to low temperature, with the MDA content, chilling injury index, POD activity, proline content and soluble protein content increased significantly, and root respiration rate, SOD activity and CAT activity decreased rapidly. With the extending of low temperature stress, root respiration rate and osmotic adjustment reduced continually, while chilling injury index increased. After 3 days recovery, the respiration rate, osmotic adjustment and SOD activity were increased. Among the test materials, T2 (with Hiranasu as rootstock) had the best recovery capability, followed by T1 (with Taibyo as rootstock) and CK (Jinong 2000). Grafting with stronger cold tolerance rootstock could improve eggplant root activity, and thus, its cold resistance markedly.
关于低温胁迫下嫁接茄子幼苗根系生理生化特性变化及其与耐寒性之间关系的研究表明，在10℃（白天）/3℃（夜间）处理初期，茄子幼苗根系对低温最为敏感，丙二醛（MDA）含量、冷害指数、过氧化物酶（POD）活性、脯氨酸含量和可溶性蛋白含量显著增加，根系呼吸速率、超氧化物歧化酶（SOD）活性和过氧化氢酶（CAT）活性迅速下降。随着低温胁迫时间延长，根系呼吸速率和渗透调节能力持续降低，而冷害指数增加。恢复3天后，呼吸速率、渗透调节能力和SOD活性有所提高。在供试材料中，T2（以平茄为砧木）恢复能力最强，其次是T1（以太郎为砧木）和CK（金农2000）。嫁接耐寒性较强的砧木可提高茄子根系活力，进而显著增强其抗寒性。
