Effects of Plant Growth-Promoting Bacteria on Photosynthetic Characteristics of Artemisia selengensis under Cadmium Stress

doi:10.11733/j.issn.1007-0435.2022.02.011

Acta Agrestia Sinica ›› 2022, Vol. 30 ›› Issue (2): 348-355.DOI: 10.11733/j.issn.1007-0435.2022.02.011

Effects of Plant Growth-Promoting Bacteria on Photosynthetic Characteristics of Artemisia selengensis under Cadmium Stress

ZHOU Xiao-mei^1,2,3,4, DONG Meng^3,4, YU Hong-bing^1,2,3,4, TAN Shu-duan^1,2, YANG Nan^1,2

1. College of architecture and urban planning,Hunan City University, Yiyang, Hunan Province 413000, China;
2. Key laboratory of key technologies of digital urban-rural spatial planning of Hunan province, Yiyang, Hunan Province 413000, China;
3. Urban and Rural Ecological Planning and Restoration Engineering Technology Research Center of Hunan, Yiyang, Hunan Province 413000, China;
4. Hunan province engineering &technology research center for rural water quality safety;Yiyang,Hunan Province 413000, China

Received:2021-07-28 Revised:2021-10-30 Published:2022-03-10

促生菌对Cd胁迫下蒌蒿光合特性的影响

周小梅^1,2,3,4, 董萌^3,4, 余红兵^1,2,3,4, 谭淑端^1,2, 杨楠^1,2

1. 湖南城市学院建筑与城市规划学院, 湖南益阳 413000;
2. 数字化城乡空间规划关键技术湖南省重点实验室, 湖南益阳 413000;
3. 湖南省城乡生态规划与修复工程技术研究中心, 湖南益阳 413000;
4. 湖南省村镇饮用水水质安全保障工程技术研究中心, 湖南益阳 413000

作者简介:周小梅(1977-),女,怀化麻阳人,博士,教授,主要从事区域生态环境保护与修复研究,E-mail:864759100@qq.com
基金资助:
湖南省自然科学基金(2019JJ40013；2015JJ4012)；湖南省教育厅创新平台开放基金项目(19K016)资助

Abstract

Abstract: To investigate the mechanism of mixed plant growth-promoting bacteria (PGPB) on photosynthetic characteristics of Artemisia selengensis under cadmium stress,a pot experiment was conducted using Bacillus sp.,T3,Pantoea agglomerans,J2,Pseudomonas fluorescens,Y5,while observed and analyzed the effect of PGPB on photosynthetic gas exchange,photosynthetic pigments,photosynthetic mineral elements,chlorophyll fluorescence parameters of Artemisia selengensis under cadmium stress. The results showed that the net photosynthetic rate (P_n),stomatal conductance (G_s),transpiration rate (T_r) of Artemisia selengensis increased by 13.7%~28.6%,11.5%~44.1%,14.3%~39.7% respectively and intercellular CO₂ concentration (G_i) decreased by 6.3%~10.1%,compared with single cadmium stress. The contents of chlorophyll a,chlorophyll b,total chlorophyll,and carotenoid increased significantly,the chlorophyll a/b value decreased significantly. The maximum photochemical efficiency (F_v/F_m) increased by 4%~18%,the effective photochemical quantum yield (Yield) increased by 12.5%~25.8%,the relative electron transport rate (rETR) increased by 6.1%~14.6%,and the photochemical quenching coefficient (qP) increased by 8.2%~20%,but the nonphotochemical quenching coefficient (NPQ) decreases by 10%~53.8%. The absorptions of P,K,Fe,Ca,Mg,S of Artemisia selengensis increased significantly. This study demonstrated that the PGPB could improve the effects of cadmium stress on photosynthetic characteristics of Artemisia selengensis,which has potential application value in the remediation of cadmium pollution soil in Dongting lake wetland.

Key words: Plant growth-promoting bacteria, Cadmium stress, Artemisia selengensis, Photosynthetic characteristics

摘要： 为揭示促生菌对Cd胁迫下蒌蒿光合特性的作用机理，利用具有促生功能的芽孢杆菌(Bacillus sp.,T3)，成团泛菌(Pantoea agglomerans,J2)，荧光假单胞菌(Pseudomonas fluorescens,Y5)的混合菌剂进行盆栽接种试验，研究促生菌对Cd胁迫下蒌蒿光合气体交换、光合色素、光合矿质元素和叶绿素荧光参数的影响。结果表明：接种促生菌蒌蒿净光合速率、气孔导度、蒸腾速率显著增加，胞间CO₂浓度明显降低；叶绿素a，叶绿素b，总叶绿素和类胡萝卜素含量增加，叶绿素a/b值显著降低；最大光化学效率、实际光化学量子产量、相对电子传递速率、光化学淬灭系系数显著增加，非光化学淬灭系数显著降低；蒌蒿对光合矿质元素P，K，Fe，Ca，Mg，S的吸收增加。因此，促生菌能改善Cd胁迫对蒌蒿光合特性的影响，在洞庭湖湿地土壤Cd污染修复中具有潜在的应用价值。

关键词: 促生细菌, Cd胁迫, 蒌蒿, 光合特性

CLC Number:

S945.78

ZHOU Xiao-mei, DONG Meng, YU Hong-bing, TAN Shu-duan, YANG Nan. Effects of Plant Growth-Promoting Bacteria on Photosynthetic Characteristics of Artemisia selengensis under Cadmium Stress[J]. Acta Agrestia Sinica, 2022, 30(2): 348-355.

周小梅, 董萌, 余红兵, 谭淑端, 杨楠. 促生菌对Cd胁迫下蒌蒿光合特性的影响[J]. 草地学报, 2022, 30(2): 348-355.

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Effects of Plant Growth-Promoting Bacteria on Photosynthetic Characteristics of Artemisia selengensis under Cadmium Stress

促生菌对Cd胁迫下蒌蒿光合特性的影响

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