Triacontanol Reduces Transplanting Shock in Machine-Transplanted Rice by Improving the Growth and Antioxidant Systems
| Autor: | She Tang, Chengqiang Ding, Yanfeng Ding, Li Yuxiang, Zhenghui Liu, Qiuyi Zhong, Li Xiaochun, Shaohua Wang, Ganghua Li, Lin Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Antioxidant medicine.medical_treatment Glutathione reductase recovery stage Plant Science 01 natural sciences 03 medical and health sciences chemistry.chemical_compound Botany medicine machine-transplanted rice Original Research biology Triacontanol food and beverages tiller Glutathione antioxidant systems APX triacontanol (TRIA) Transplantation Horticulture 030104 developmental biology chemistry Catalase Chlorophyll biology.protein transplanting shock 010606 plant biology & botany |
| Zdroj: | Frontiers in Plant Science |
| ISSN: | 1664-462X |
| Popis: | Machine transplantation results in serious transplant shock in seedlings and results in a longer recover stage, which negatively impacts the growth of low-position tillers and the yield of machine-transplanted rice. A barrel experiment was conducted to examine the effect of the foliar application of triacontanol (TRIA) on machine-transplanted rice during the recovery stage. TRIA (0, 1, 5, and 10 μM) was sprayed over leaves 2 days before transplanting. The chlorophyll content, sucrose content, oxidative damage, antioxidant enzyme levels, glutathione (GSH), and ascorbate (ASA) redox states, tiller dynamics and yield components of the plants were investigated. The results show that foliar-applied TRIA significantly alleviates the growth inhibition and oxidative damage caused by transplant shock. Furthermore, the application of TRIA increased the chlorophyll and sucrose contents of the plants. Importantly, TRIA not only significantly improved the activity of catalase (CAT) and guaiacol peroxidase (POD), demonstrating that POD can play an important role in scavenging H2O2 during the recovery stage, but it also enhanced the redox states of ASA and GSH by regulating the activities of enzymes involved in the ASA-GSH cycle, such as ascorbate peroxidase (APX) and glutathione reductase (GR). A dose of 10 μM TRIA was the most efficient in reducing the negative effects of transplant shock, increasing the panicles, grain filling, and grain yield per hill by 17.80, 5.86, and 16.49%, respectively. These results suggest that TRIA acts to reduce transplant shock in association with the regulation of the redox states of ASA and GSH and antioxidant enzymes and serves as an effective antioxidant to maintain photosynthetic capacity and promote the occurrence of low tillers. |
| Databáze: | OpenAIRE |
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