發(fā)布時(shí)間：2018-10-11 08:38

【摘要】：以辣椒苗為試材,采用盆栽稱重法將辣椒土壤含水量控制在40%~50%,將不同濃度的維生素C溶液(0、20、40、60、80、100、120 mg·L-1)對(duì)辣椒葉面進(jìn)行噴施,通過(guò)測(cè)定辣椒根系的形態(tài)指標(biāo)和生理指標(biāo),研究了不同濃度維生素C對(duì)干旱脅迫下辣椒苗期根系生長(zhǎng)的影響。結(jié)果表明:一定濃度的維生素C能夠緩解干旱脅迫對(duì)辣椒根系生長(zhǎng)的影響,提高辣椒根系的吸水和保水能力;表現(xiàn)為低濃度促進(jìn),高濃度抑制,維生素C濃度為40 mg·L-1時(shí),干旱緩解效果最顯著,根系的含水量、質(zhì)膜透性分別比對(duì)照減少2.58%和11.46%,辣椒根系長(zhǎng)度、根系活力、過(guò)氧化氫酶(CAT)活性、脯氨酸(Pro)含量分別比對(duì)照增加0.273%、1.33%、11.1%和13.61%,過(guò)氧化物酶(POD)活性比對(duì)照增加12倍。
[Abstract]:The soil moisture content of capsicum was controlled at 40 ~ (50) by pot weighing method. Different concentrations of vitamin C (0 ~ (20) ~ 40 ~ (60) C) were sprayed on the leaf surface of capsicum. The morphological and physiological indexes of pepper root system were determined. The effects of different concentrations of vitamin C on the root growth of pepper seedlings under drought stress were studied. The results showed that a certain concentration of vitamin C could alleviate the effect of drought stress on the growth of pepper root system and improve the water absorption and water retention ability of pepper root system, which was promoted by low concentration, inhibited by high concentration, and inhibited by vitamin C concentration of 40 mg 路L ~ (-1). The effect of drought mitigation was most significant, the root water content and plasma membrane permeability were decreased by 2.58% and 11.46%, respectively. The root length, root activity and (CAT) activity of catalase were decreased respectively. The content of proline (Pro) was increased by 11.1% and 13.61%, respectively, and the activity of peroxidase (POD) was increased by 12 times compared with the control.
【作者單位】： 河南科技大學(xué)林學(xué)院;洛陽(yáng)農(nóng)林科學(xué)院蔬菜研究中心;
【基金】：河南科技大學(xué)博士科研啟動(dòng)資助項(xiàng)目(13480017,13480045)
【分類號(hào)】：S423;S641.3
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本文編號(hào)：2263547