摘要
为提高番茄耐低温性,以L-402番茄幼苗为材料,叶面喷施浓度为10,30和50 mg·L^(-1)的DCPTA,以清水处理作为对照,随后进行昼/夜10℃/5℃低温处理,于处理第5天进行生理指标测定,研究DCPTA对番茄幼苗叶片和根系相关生理指标的影响。结果表明,喷施DCPTA可显著降低低温条件下番茄幼苗叶片的相对电导率和丙二醛(MDA)含量;喷施10和30 mg·L^(-1)DCPTA可显著提高低温条件下番茄幼苗叶片叶绿素含量;30 mg·L^(-1)DCPTA处理也可显著提高番茄幼苗叶片的可溶性蛋白含量;喷施30和50 mg·L^(-1)DCPTA可显著增加低温下番茄幼苗的根系活力;但是DCPTA处理对番茄幼苗根系的根总长、表面积、体积和平均直径影响不显著。研究认为,喷施DCTPA能缓解低温对番茄幼苗的伤害,适宜浓度为30 mg·L^(-1)。
In order to improve the low-temperature tolerance of tomatoes,the L-402 tomato seedlings were used as the material,then different DCPTA concentration(10,30,50 mg·L^(-1))were sprayed to the leaves of tomato seedlings,and the water was used as control,then they were treated with low-temperature stress(10℃/5℃,day/night),and the physiological indexes were measured at the fifth day to study the effect of DCPTA on physiological response of tomato seedling leaves and roots.The results showed that spraying DCPTA significantly decreased the relative conductivity and malondialdehyde(MDA)content of tomato seedling leaves under low-temperature stress.Spraying 10 and 30 mg·L^(-1) DCPTA significantly increased the chlorophyll content of tomato leaves under low-temperature stress.30 mg·L^(-1) DCPTA treatment significantly increased the soluble protein content of tomato leaves.30 and 50 mg·L^(-1) DCPTA treatment significantly increased root activity of tomato seedlings under low-temperature stress;While there was no significant influence on root length,surface area,volume and average diameter of tomato seedlings root.Therefore,we conclude that DCPTA could alleviate the damage of tomato seedlings under chilling stress,and the suitable concentration of DCPTA was 30 mg·L^(-1).This work could providetheoretical basis for the application of DCPTA on tomato cultivation.
作者
曹振
洪兆磊
王婷婷
CAO Zhen;HONG Zhaolei;WANG Tingting(Jinan Entrepreneurial Highway Engineering Co.,Ltd.,Jinan 250000,China;China Communications Construction Landscape(Shandong)Co.,Ltd.,Jinan 250000,China)
出处
《黑龙江农业科学》
2025年第7期61-66,共6页
Heilongjiang Agricultural Sciences
基金
山东省临沂经开区新旧动能转换东部生态示范园区市政道路项目(2024-060-SJ)。
关键词
番茄
低温胁迫
DCPTA
生理机制
tomato
low-temperature stress
DCPTA
physiological mechanism
