Jie Yuling, Zhao Haizhou, Zhang Wei, Yang Hongqiang, Li Dequan, Shu Huairui
College of Horticulture, Shandong Agricultural University, Tai'an 271018, Shandong, China.
Ying Yong Sheng Tai Xue Bao. 2006 Dec;17(12):2394-8.
In a pot experiment with 4-year-old apple root stock (Malus hupehensis), this paper studied the effects of foliar-spraying exogenous glycinebetaine (GB) on the leaf ultraweak luminescence (UWL), contents of malondialdehyde (MDA), hydrogen peroxide (H2O2), endogenous GB and proline (Pro), and activities of superoxide dismutase (SOD) and peroxidase (POD) under drought stress. The results showed that UWL intensity increased under slight- and mid drought stress, but decreased with increasing drought stress till lower than the control. Under slight- and mid drought stress, foliar-spraying GB improved the UWL intensity by 35.27% and 43.95%, respectively, decreased H2O2 and MDA contents, increased SOD and POD activities, and promoted the accumulation of GB and Pro. The exogenous GB and its induced Pro accumulation could increase the anti-oxidative capability of M. hupehensis leaves, and protect the leaf cells from oxidative damage under drought stress.
在以4年生苹果砧木（湖北海棠）进行的盆栽试验中，本文研究了干旱胁迫下叶面喷施外源甘氨酸甜菜碱（GB）对叶片超微弱发光（UWL）、丙二醛（MDA）、过氧化氢（H2O2）、内源GB和脯氨酸（Pro）含量以及超氧化物歧化酶（SOD）和过氧化物酶（POD）活性的影响。结果表明，在轻度和中度干旱胁迫下，UWL强度增加，但随着干旱胁迫加剧而降低，直至低于对照。在轻度和中度干旱胁迫下，叶面喷施GB分别使UWL强度提高了35.27%和43.95%，降低了H2O2和MDA含量，提高了SOD和POD活性，并促进了GB和Pro的积累。外源GB及其诱导的Pro积累可提高湖北海棠叶片的抗氧化能力，保护叶片细胞免受干旱胁迫下的氧化损伤。
