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Seaweed extract combined with boron promotes the growth of sugar beet by improving the photosynthetic performance under boron deficiency

文献类型： 外文期刊

作者： Yang, Songlin 1 ; Wu, Wenyu 1 ; Liu, Shangxuan 1 ; Zhao, Xiaoyu 1 ; Riaz, Muhammad 6 ; Ishfaq, Muhammad 7 ; Wang, Yan 1 ; Kuerban, Abudukadier 8 ; Xing, Wang 4 ; Song, Baiquan 1 ;

作者机构： 1.Heilongjiang Univ, Minist Educ, Engn Res Ctr Agr Microbiol Technol, Harbin, Peoples R China

2.Heilongjiang Univ, Heilongjiang Prov Key Lab Ecol Restorat & Resource, Harbin, Peoples R China

3.Heilongjiang Univ, Sch Life Sci, Harbin, Peoples R China

4.Heilongjiang Univ, Coll Adv Agr & Ecol Environm, Harbin, Peoples R China

5.Heilongjiang Univ, Natl Beet Medium Term Gene Bank, Harbin, Peoples R China

6.Zhongkai Univ Agr & Engn, Coll Resources & Environm, Guangzhou, Peoples R China

7.Shenzhen Univ, Coll Life Sci & Oceanog, Shenzhen, Peoples R China

8.Xinjiang Acad Agr Sci, Res Inst Econ Crops, Urumqi, Xinjiang, Peoples R China

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：3.6； 五年影响因子：5.4 ）

ISSN： 0031-9317

年卷期： 2025 年 177 卷 2 期

页码：

收录情况： SCI

摘要： Biostimulants can improve mineral nutrient effectiveness, but the physiological mechanisms by which seaweed extract, a natural biostimulant, and boron (B) fertilizer promote the growth of sugar beet under B deficiency are not clear. In this study, B and seaweed extract were applied under B-deficiency (0.32 mg B kg(-1) soil) and potentially B-deficient conditions (0.69 mg B kg(-1) soil), and the growth and photochemical properties of sugar beet seedlings were investigated. The results indicated that B application alone or with seaweed extract promoted sugar beet growth, with the combined application having a significantly enhanced effect. When comparing the two soils with different B content (deficient and moderately deficient), the spray of seaweed extract under the B-deficient condition was more effective. After the addition of seaweed extract, the B content of the shoots and roots increased by 28.56% and 12.64%, respectively, under B deficiency(0.32 mg B kg(-1) soil). Furthermore, the content of chlorophyll a (Chla), chlorophyll b (Chlb), and the net photosynthesis rate (P-n) increased by 8.96%, 30.57%, and 13.74%, respectively. The addition of seaweed extract significantly improved the light saturation point (P-m), with a 35.00% increase compared to the control. Additionally, it increased the quantum yield (ETO/CSm) of leaf electron transfer per unit area and reduced the absorption of light energy loss of the PS reaction center (DIO/RC) and per unit area (DIO/CSm), thereby improving photosynthetic performance and significantly increasing aboveground dry matter accumulation by 19.05%. In conclusion, seaweed extract can enhance B absorption, light energy capture and utilization ability. It provides the theoretical evidence for the regulation of B nutrition in sugar beet and the rational application of biostimulants.

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