肉桂醛对NaCl胁迫下番茄幼苗生长特性的影响

Effects of cinnamaldehyde on growth characteristics of tomato seedlings under NaCl stress

关键词:  番茄, 肉桂醛, NaCl胁迫, 生长特性, 耐盐性

Key words:  tomato(Solanum lycopersicum), cinnamaldehyde, NaCl stress, growth characteristics, salt tolerance

摘要:

为探明肉桂醛对番茄幼苗耐盐性的影响,该研究以番茄‘合作903' 为试验材料,探究肉桂醛(100 μg·L^-1 )对处于100 mmol·L^-1 NaCl胁迫下番茄种子萌发与幼苗生长特性的影响。在试验中设置4组处理:对照(CK,蒸馏水)、NaCl(100 mmol·L^-1)、NaCl+CA(100 mmol·L^-1 NaCl + 100 μg·L^-1 CA)、CA(100 μg·L^-1)。结果表明:(1)在100 mmol·L^-1 NaCl胁迫下,添加100 μg·L^-1 的肉桂醛,番茄种子的发芽势和发芽率均有所提升,番茄幼苗的根长和鲜重均显著提高,说明添加肉桂醛对NaCl胁迫下番茄种子的萌发与幼苗生长均有一定缓解作用。(2)肉桂醛能够有效降低NaCl胁迫导致的番茄幼苗根尖总活性氧(reactive oxygen species, ROS)的过量累积,缓解膜脂过氧化程度从而降低细胞死亡率。综上表明,肉桂醛处理能够通过缓解幼苗的氧化损伤程度,提高番茄萌发与幼苗时期的耐盐性,肉桂醛作为一种新型制剂具有在田间生产应用的潜力。

Abstract:

In order to investigate the effects of cinnamaldehyde(CA)on salt tolerance of tomato seedlings, we used tomato ‘Cooperative 903' as experimental material, and investigated the characteristics of germination and seedling growth of tomato under NaCl(100 mmol·L^-1)stress compared with the treatment of adding CA(100 μg·L^-1). We set up four groups of treatments in the experiment: Control(CK, distilled water), NaCl(100 mmol·L^-1), NaCl+CA(100 mmol·L^-1 NaCl + 100 μg·L^-1 CA), and CA(100 μg·L^-1). The results were as follows:(1)With the application of CA, the germination potential and the germination rate of tomato seeds were both improved. The root length and fresh weight of tomato seedlings were also significantly increased under NaCl(100 mmol·L^-1)stress.(2)CA could effectively alleviate the excessive accumulation, oxidative damage and cell death of total ROS caused by salt stress in roots of tomato seedlings. To sum up, CA can improve the salt tolerance of tomato during germination and seedling stage by alleviating the degree of oxidative damage of seedlings, and CA has the potential in field production as a new preparation.