Sumei Li, Ruijie Zhang, Qiuling Hui, Heinz Rennenberg, Bin Hu
{"title":"与西伯利亚桤木混作加重了盐暴露对刺槐植株生长和主要生理过程的负面影响。","authors":"Sumei Li, Ruijie Zhang, Qiuling Hui, Heinz Rennenberg, Bin Hu","doi":"10.1111/ppl.70494","DOIUrl":null,"url":null,"abstract":"<p><p>Salinity is a major threat that can greatly affect the growth and development of plants. Mixed planting has been shown to effectively improve the salinity tolerance of tree species. However, it is still unknown whether admixing alder trees promotes the growth and development of N<sub>2</sub>-fixing Robinia pseudoacacia on saline soil. To address this question, single-planted Robinia seedlings and Robinia seedlings mixed with Siberian alder (Alnus hirsuta Turcz. ex Rupr.) were subjected to salt exposure, and growth parameters, photosynthetic characteristics, cation contents and ratios, osmoregulation by compatible solutes, and antioxidant metabolism were analyzed. The results showed that salt exposure significantly reduced whole-plant biomass, net photosynthesis rate, total chlorophyll content, and nodule nitrogenase activity of Robinia at both single and mixed planting with Siberian alder. Salt exposure significantly increased the accumulation of Na<sup>+</sup>, malondialdehyde, and hydrogen peroxide in the leaves of both single and mixed planted Robinia. Under salt exposure, mixed planting significantly inhibited the growth and nitrogen fixation capacity of Robinia due to interspecific competition, indicated by reduced biomass accumulation and photosynthetic efficiency compared with single planting. In addition, mixed planting exacerbated Na<sup>+</sup> toxicity in Robinia roots and enhanced oxidative stress in Robinia leaves and roots, indicated by elevated hydrogen peroxide contents. These results indicate that mixing Robinia with Siberian alder at the seedling stage not only inhibits the nitrogen fixation capacity of Robinia but also reduces its salinity tolerance. They provide an important theoretical reference for the establishment of mixed Robinia forests at the seedling stage, particularly in salinized soils.</p>","PeriodicalId":20164,"journal":{"name":"Physiologia plantarum","volume":"177 5","pages":"e70494"},"PeriodicalIF":3.6000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mixed Cultivation With Siberian Alder Worsens the Negative Impact of Salt Exposure on Growth and Major Physiological Processes of Black Locust Plants.\",\"authors\":\"Sumei Li, Ruijie Zhang, Qiuling Hui, Heinz Rennenberg, Bin Hu\",\"doi\":\"10.1111/ppl.70494\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Salinity is a major threat that can greatly affect the growth and development of plants. Mixed planting has been shown to effectively improve the salinity tolerance of tree species. However, it is still unknown whether admixing alder trees promotes the growth and development of N<sub>2</sub>-fixing Robinia pseudoacacia on saline soil. To address this question, single-planted Robinia seedlings and Robinia seedlings mixed with Siberian alder (Alnus hirsuta Turcz. ex Rupr.) were subjected to salt exposure, and growth parameters, photosynthetic characteristics, cation contents and ratios, osmoregulation by compatible solutes, and antioxidant metabolism were analyzed. The results showed that salt exposure significantly reduced whole-plant biomass, net photosynthesis rate, total chlorophyll content, and nodule nitrogenase activity of Robinia at both single and mixed planting with Siberian alder. Salt exposure significantly increased the accumulation of Na<sup>+</sup>, malondialdehyde, and hydrogen peroxide in the leaves of both single and mixed planted Robinia. Under salt exposure, mixed planting significantly inhibited the growth and nitrogen fixation capacity of Robinia due to interspecific competition, indicated by reduced biomass accumulation and photosynthetic efficiency compared with single planting. In addition, mixed planting exacerbated Na<sup>+</sup> toxicity in Robinia roots and enhanced oxidative stress in Robinia leaves and roots, indicated by elevated hydrogen peroxide contents. These results indicate that mixing Robinia with Siberian alder at the seedling stage not only inhibits the nitrogen fixation capacity of Robinia but also reduces its salinity tolerance. They provide an important theoretical reference for the establishment of mixed Robinia forests at the seedling stage, particularly in salinized soils.</p>\",\"PeriodicalId\":20164,\"journal\":{\"name\":\"Physiologia plantarum\",\"volume\":\"177 5\",\"pages\":\"e70494\"},\"PeriodicalIF\":3.6000,\"publicationDate\":\"2025-09-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physiologia plantarum\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1111/ppl.70494\",\"RegionNum\":2,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physiologia plantarum","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1111/ppl.70494","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
Mixed Cultivation With Siberian Alder Worsens the Negative Impact of Salt Exposure on Growth and Major Physiological Processes of Black Locust Plants.
Salinity is a major threat that can greatly affect the growth and development of plants. Mixed planting has been shown to effectively improve the salinity tolerance of tree species. However, it is still unknown whether admixing alder trees promotes the growth and development of N2-fixing Robinia pseudoacacia on saline soil. To address this question, single-planted Robinia seedlings and Robinia seedlings mixed with Siberian alder (Alnus hirsuta Turcz. ex Rupr.) were subjected to salt exposure, and growth parameters, photosynthetic characteristics, cation contents and ratios, osmoregulation by compatible solutes, and antioxidant metabolism were analyzed. The results showed that salt exposure significantly reduced whole-plant biomass, net photosynthesis rate, total chlorophyll content, and nodule nitrogenase activity of Robinia at both single and mixed planting with Siberian alder. Salt exposure significantly increased the accumulation of Na+, malondialdehyde, and hydrogen peroxide in the leaves of both single and mixed planted Robinia. Under salt exposure, mixed planting significantly inhibited the growth and nitrogen fixation capacity of Robinia due to interspecific competition, indicated by reduced biomass accumulation and photosynthetic efficiency compared with single planting. In addition, mixed planting exacerbated Na+ toxicity in Robinia roots and enhanced oxidative stress in Robinia leaves and roots, indicated by elevated hydrogen peroxide contents. These results indicate that mixing Robinia with Siberian alder at the seedling stage not only inhibits the nitrogen fixation capacity of Robinia but also reduces its salinity tolerance. They provide an important theoretical reference for the establishment of mixed Robinia forests at the seedling stage, particularly in salinized soils.
期刊介绍:
Physiologia Plantarum is an international journal committed to publishing the best full-length original research papers that advance our understanding of primary mechanisms of plant development, growth and productivity as well as plant interactions with the biotic and abiotic environment. All organisational levels of experimental plant biology – from molecular and cell biology, biochemistry and biophysics to ecophysiology and global change biology – fall within the scope of the journal. The content is distributed between 5 main subject areas supervised by Subject Editors specialised in the respective domain: (1) biochemistry and metabolism, (2) ecophysiology, stress and adaptation, (3) uptake, transport and assimilation, (4) development, growth and differentiation, (5) photobiology and photosynthesis.