Journal of Zhejiang University

Journal of Zhejiang University SCIENCE B

Accepted manuscript available online (unedited version)

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(s): Xue WANG¹, Li JIANG², Yao GE¹, Yiping ZOU¹, Qingsheng CAI¹, Yan XIA¹, Laiqing LOU¹
Affiliation(s): ¹College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China; more
Corresponding email(s): loulq@njau.edu.cn
Key Words: Apocynum pictum Schrenk; Salt stress; Plant growth-promoting bacteria; Seed germination; Photosynthesis; Antioxidant enzymes

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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,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.B2500049

@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",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.B2500049"
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%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
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%@ 1673-1581
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%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.B2500049"

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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
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EP -
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Y1 - in press
PB - Zhejiang University Press & Springer
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doi="https://doi.org/10.1631/jzus.B2500049"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

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/CS_m) and the efficiency of electron transfer to photosystem I (δR_o and φR_o). Additionally, PGPB improved chlorophyll fluorescence and key photosynthetic parameters, including the maximum quantum yield (φP_o), overall performance index (PI), and net photosynthetic rate (P_n). 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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On-line Access: 2025-05-23

Received: 2025-01-25

Revision Accepted: 2025-04-17

Crosschecked: 0000-00-00

Cited: 0

Clicked: 3017

Citations: Bibtex RefMan EndNote GB/T7714

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