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Halotolerant plant growth-promoting bacteria Enterobacter sp. Av16 and Acinetobacter sp. Av23 enhance seed germination and seedling photosynthesis of Apocynum pictum under salt stress
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Xue WANG1, Li JIANG2, Yao GE1, Yiping ZOU1, Qingsheng CAI1, Yan XIA1, Laiqing LOU1. Halotolerant plant growth-promoting bacteria Enterobacter sp. Av16 and Acinetobacter sp. Av23 enhance seed germination and seedling photosynthesis of Apocynum pictum under salt stress[J]. Journal of Zhejiang University Science B, 1998, -1(-1): .
@article{title="Halotolerant plant growth-promoting bacteria Enterobacter sp. Av16 and Acinetobacter sp. Av23 enhance seed germination and seedling photosynthesis of Apocynum pictum under salt stress",
author="Xue WANG1, Li JIANG2, Yao GE1, Yiping ZOU1, Qingsheng CAI1, Yan XIA1, Laiqing LOU1",
journal="Journal of Zhejiang University Science B",
volume="-1",
number="-1",
pages="",
year="1998",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B2500049"
}
%0 Journal Article
%T Halotolerant plant growth-promoting bacteria Enterobacter sp. Av16 and Acinetobacter sp. Av23 enhance seed germination and seedling photosynthesis of Apocynum pictum under salt stress
%A Xue WANG1
%A Li JIANG2
%A Yao GE1
%A Yiping ZOU1
%A Qingsheng CAI1
%A Yan XIA1
%A Laiqing LOU1
%J Journal of Zhejiang University SCIENCE B
%V -1
%N -1
%P
%@ 1673-1581
%D 1998
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B2500049
TY - JOUR
T1 - Halotolerant plant growth-promoting bacteria Enterobacter sp. Av16 and Acinetobacter sp. Av23 enhance seed germination and seedling photosynthesis of Apocynum pictum under salt stress
A1 - Xue WANG1
A1 - Li JIANG2
A1 - Yao GE1
A1 - Yiping ZOU1
A1 - Qingsheng CAI1
A1 - Yan XIA1
A1 - Laiqing LOU1
J0 - Journal of Zhejiang University Science B
VL - -1
IS - -1
SP -
EP -
%@ 1673-1581
Y1 - 1998
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B2500049
Abstract: apocynum pictum Schrenk, a halophyte, is commonly used as a traditional Chinese medicine, tea, and fiber crop. To improve the growth of A. pictum in saline soil, its responses to halotolerant plant growth-promoting bacteria (PGPB) were investigated at germination and during early growth stages. Inoculation with either Enterobacter sp. Av16 or Acinetobacter sp. Av23 significantly improved seed germination percentage and alleviated the adverse effects of salinity on seedling growth of A. pictum. Under salt stress, PGPB increased leaf area and improved photosynthetic pigments, including chlorophyll a+b and carotenoids. Notably, PGPB alleviated salt-induced damage to the photosynthetic apparatus by stabilizing the photosystems and optimizing electron transport processes. This was evidenced by increases in the density of reaction centers (RC/CSm) and the efficiency of electron transfer to photosystem I (δRo and φRo). Additionally, PGPB improved chlorophyll fluorescence and key photosynthetic parameters, including the maximum quantum yield (φPo), overall performance index (PI), and net photosynthetic rate (Pn). Furthermore, PGPB activated antioxidant enzymes, such as superoxide dismutase (SOD) and catalase (CAT), reducing the accumulation of reactive oxygen species (ROS) in A. pictum. In summary, PGPB enhanced A. pictum seed germination and photosynthetic capacity by stabilizing photosystems, improving stomatal conductance, and mitigating oxidative stress under salt stress. These findings highlight the potential of PGPB inoculation as a sustainable strategy to enhance salt resilience in A. pictum.
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