豆蔻酸对茄子幼苗生长和叶片防御酶活性的影响

Effects of Tetradecanoic Acid on Growth and Activities of Leaf Defense Enzymes of Eggplant Seedlings

采用模拟结合田间试验的方法,研究不同浓度豆蔻酸对茄子幼苗生长及叶片防御酶活性的影响。结果表明,在豆蔻酸浓度为0.05-1 mmol·L-1时,随浓度的增加,豆蔻酸对茄子幼苗生长指标、叶绿素含量、根系活力的促进作用逐渐增加,在1 mmol·L-1时促进作用最大,而后随着浓度增大,又表现出抑制作用。适宜浓度的豆蔻酸对丙二醛（MDA）含量和相对电导率起到抑制作用,并随浓度增加作用强度增大。当浓度增至1 mmol·L-1时,表现的抑制作用最强;在0.05-1 mmol·L-1时,豆蔻酸对叶片防御酶CAT、POD、PPO和PAL活性均表现促进作用,且在1 mmol·L-1的促进作用最大。豆蔻酸在某种程度上促进茄子幼苗的生长并提高叶片防御酶的活性。

Effects of the tetradecanoic acid with different concentrations on growth and activities of leaf defense enzymes of eggplant seedlings were studied in laboratory and field experiment by a simulation way.The results showed that with the increasing of tetradecanoic acid concentrations（0.05-1 mmol·L-1）,the growth of eggplant seedlings,leaf chlorophyll content and root vigor could be promoted,and the best effect presented in 1 mmol·L-1 treatment.While the MDA content and relative electricity conductivity were inhibited by tetradecanoic acid at a low concentration,and the inhibitory rates were enhanced with the increasing concentration.Up to 1 mmol·L-1,tetradecanoic acid presented the strongest inhibition.With the increasing of tetradecanoic acid concentrations（0.05-1 mmol·L-1）,activities of CAT,POD,PPO and PAL could be promoted,and the best effect presented in 1 mmol·L-1 treatment.the tetradecanoic acid can enhance the seedling growth of eggplants and promote activities of membrance defense enzymes in eggplant seedlings.