Plant growth, ion accumulation, and antioxidant enzymes of endophyte-infected and endophyte-free tall fescue to salinity stress
| العنوان: | Plant growth, ion accumulation, and antioxidant enzymes of endophyte-infected and endophyte-free tall fescue to salinity stress |
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| المؤلفون: | Lu Pan, Yiwei Jiang, Randy D. Dinkins, Shimao Cui |
| المصدر: | Acta Physiologiae Plantarum. 43 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, biology, Physiology, fungi, food and beverages, Plant Science, Epichloë coenophiala, Malondialdehyde, biology.organism_classification, APX, 01 natural sciences, Endophyte, Salinity, Lipid peroxidation, 03 medical and health sciences, chemistry.chemical_compound, 030104 developmental biology, Animal science, chemistry, Catalase, biology.protein, Agronomy and Crop Science, Chlorophyll fluorescence, 010606 plant biology & botany |
| الوصف: | Endophyte-mediated salinity tolerance is largely unknown in tall fescue [Schedonorus arundinaceus (Schreb.)]. The experiment was designed to characterize growth, ion accumulation, and antioxidant metabolism of tall fescue infected by the endophyte Epichloe coenophiala to different levels of salinity stress. Endophyte-infected (E +) and endophyte-free (E−) tall fescue (cv Kentucky 31) plants were exposed to 10 d of 0 (unstressed control), 100 and 200 mM NaCl treatments in a greenhouse, respectively. Salinity stress caused reductions in plant height, leaf fresh weight (LFW), leaf dry weight (LDW), and leaf water content (LWC), and increased Na+ concentration, but E + plants had significantly higher LFW, LDW, and LWC under both NaCl treatments and lower Na+ than E− plants under 200 mM NaCl. Salinity stress decreased K+ and Mg2+ and did not alter P, and increased Ca2+ in E + plants and caused no change in Ca2+ in E− plants; however, endophyte had no effects on these elements. Chlorophyll fluorescence (Fv/Fm), malondialdehyde (MDA) concentration, and activities of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) remained unchanged in E + plants, but Fv/Fm was reduced and MDA level and enzyme activities were elevated in E− plants under 200 mM NaCl, where E + plants had significantly higher Fv/Fm and lower MDA, SOD, and APX activities than E− plants. Peroxidase activities increased in E + plants under 200 mM NaCl and in E− plants under both NaCl treatments. The results indicated that endophyte promoted salinity tolerance in tall fescue through maintaining higher growth and photochemical efficiency and lowering Na+ accumulation and lipid peroxidation. The significantly induced antioxidant enzyme activities and lipid peroxidation in E− plants suggested a possible enhanced oxidative injury in endophyte-free plants exposed to a high level of salinity stress. |
| تدمد: | 1861-1664 0137-5881 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::46b9cc712ad814df3771556e84d2c027 https://doi.org/10.1007/s11738-021-03268-4 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........46b9cc712ad814df3771556e84d2c027 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 18611664 01375881 |
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