【摘要】：選取大小一致的美人蕉(Canna indica)作為研究試材,在小型模擬人工濕地系統(tǒng)中,研究含不同濃度(0、5、10、20、40、60 mg/L)鉻(VI)脅迫下美人蕉的生理生態(tài)響應(yīng),為處理含鉻(VI)廢水的植物修復(fù)材料提供科學(xué)依據(jù)。結(jié)果表明,不同濃度鉻(VI)脅迫下,美人蕉葉綠素、丙二醛(MDA)、還原型谷光甘肽(GSH)含量呈現(xiàn)出不同程度的變化趨勢;其含量先升高后降低,但超氧陰離子變化趨勢相反;同時脯氨酸(Pro含量)在不同濃度脅迫下無顯著差異。超氧化物歧化酶(SOD)、過氧化氫酶(CAT)、過氧化物酶(POD)和苯丙氨酸解氨酶(PAL)活性隨鉻脅迫濃度的增加呈現(xiàn)先升后降的趨勢。鉻脅迫濃度為20 mg/L時凈光合速率(P_n)、氣孔導(dǎo)度(G_s)最高,而低濃度(小于40 mg/L)脅迫下蒸騰速率(T_r)、胞間CO_2含量(C_i)無顯著差異。綜上,鉻脅迫下美人蕉對其生理生態(tài)特性做出相應(yīng)的調(diào)整,表現(xiàn)較強的適應(yīng)力和耐污力,可作為處理含鉻廢水的濕地植物備選物種之一。
[Abstract]:The physiological and ecological responses of Canna indica under different concentrations of chromium (VI) were studied in a small simulated constructed wetland system. It provides scientific basis for the treatment of wastewater containing chromium (VI). The results showed that the contents of chlorophyll, malondialdehyde (MDA) and glutathione (GSH) in different concentrations of chromium (VI) showed a varying trend, and the content of chlorophyll, malondialdehyde (MDA) and glutathione (GSH) increased first and then decreased, but the change trend of superoxide anion was opposite. At the same time, there was no significant difference in proline (Pro) content under different concentrations of stress. The activities of superoxide dismutase (SOD), catalase (cat), peroxidase (POD) and phenylalanine ammonia-lyase (pal) increased firstly and then decreased with the increase of chromium stress concentration. The net photosynthetic rate (PIV) and stomatal conductance (Gs) were the highest at 20 mg / L Cr stress, but there was no significant difference in the transpiration rate (TSP) and the intercellular CO2 content (CSTI) under low concentration (< 40 mg / L). In conclusion, canna can be used as an alternative species for treating wastewater containing chromium by adjusting its physiological and ecological characteristics, showing strong adaptability and resistance to pollution.
【作者單位】： 貴州民族大學(xué)喀斯特濕地生態(tài)研究中心化學(xué)與生態(tài)環(huán)境工程學(xué)院;
【基金】：國家自然科學(xué)基金(31560107)資助
【分類號】：X503.231

【相似文獻】

相關(guān)期刊論文 前1條

1 李遠偉;姜靜;茍姝貞;鄧仕槐;;模擬酸雨對芭蕉、美人蕉葉片生理特性的影響[J];四川農(nóng)業(yè)大學(xué)學(xué)報;2013年03期

相關(guān)博士學(xué)位論文 前1條

1 吳文衛(wèi);模擬濕地系統(tǒng)中水生美人蕉(Canna generalis)凈化農(nóng)田退水硝態(tài)氮的機理及應(yīng)用研究[D];昆明理工大學(xué);2016年

相關(guān)碩士學(xué)位論文 前1條

1 張長弘;生態(tài)溝渠中美人蕉對氮去除的研究[D];武漢紡織大學(xué);2014年

，

本文編號：2138166