摘要
以辣椒苗为试材,采用盆栽称重法将辣椒土壤含水量控制在40%~50%,将不同浓度的维生素C溶液(0、20、40、60、80、100、120 mg·L-1)对辣椒叶面进行喷施,通过测定辣椒根系的形态指标和生理指标,研究了不同浓度维生素C对干旱胁迫下辣椒苗期根系生长的影响。结果表明:一定浓度的维生素C能够缓解干旱胁迫对辣椒根系生长的影响,提高辣椒根系的吸水和保水能力;表现为低浓度促进,高浓度抑制,维生素C浓度为40 mg·L-1时,干旱缓解效果最显著,根系的含水量、质膜透性分别比对照减少2.58%和11.46%,辣椒根系长度、根系活力、过氧化氢酶(CAT)活性、脯氨酸(Pro)含量分别比对照增加0.273%、1.33%、11.1%和13.61%,过氧化物酶(POD)活性比对照增加12倍。
Pepper seedling was used as test material,the soil moisture in 40%-50% was controled by using the weighing method for potted and sprayed different concentrations of vitamin C on the leaf of pepper. The concentrations were 0,20,40,60,80,100,120 mg·L-1,respectively.Morphological and physiological indexes of pepper root were measured and explored effects of drought stress and vitamin C on growth of pepper seedling root.The results showed that,a certain concentration of vitamin C could alleviate the effects of drought stress on root growth of pepper and improve the absorption of pepper roots and water retention ability. Meanwhile,low concentrations of vitamin C promoted the growth of pepper roots while high concentrations inhibited.The effect was the most significant when the concentration was 40 mg·L-1.Root length increased by 0. 273%.Root water content and membrane permeability decrease by 2. 58% and 11. 46%,respectively.Root activity,CAT activity,Pro content and POD activity increased 1. 33%,11. 1%,13. 61% and 12 times than that of control,respectively.
出处
《北方园艺》
CAS
北大核心
2017年第21期13-17,共5页
Northern Horticulture
基金
河南科技大学博士科研启动资助项目(13480017
13480045)
