野生稻长毛谷旺盛生命力解析及其对烯效唑的响应

Analysis of the vigorous vitality of wild rice variety Changmaogu and its response to propiconazole

为探讨烯效唑对水稻幼苗生长及生理特性的影响,本试验采用盆栽的方式,以野生稻长毛谷和常规稻9311为材料,研究了叶面喷施20 mg·L^(-1)烯效唑对2个不同水稻品种生长表型、生理代谢的影响。结果表明:烯效唑降低了2个水稻品种的株高生长率,维持了长毛谷较稳定的叶面积生长率,一定程度上增加了根长和根平均直径,显著增加了幼苗的生物量,提高了叶绿素a、叶绿素b和总叶绿素含量;此外,烯效唑处理还显著提高了2个品种幼苗叶片的净光合速率、蒸腾速率及气孔导度及PSⅡ实际光化学效率、电子传递速率等,增强了叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)、抗坏血酸过氧化物酶(APX)和过氧化氢酶(CAT)活性。综上,叶面喷施20 mg·L^(-1)烯效唑能有效促进水稻幼苗的生长,并改善其生理特性。

To explore the effects of propiconazole on rice seedlings,a pot experiment was conducted using wild rice variety Changmaogu and conventional rice variety 9311.This study investigated the impact of foliar spraying with 20 mg·L^(-1) propiconazole on the growth phenotypes and physiological metabolism of these two rice varieties.The results showed that propiconazole reduced the plant height growth rate of both rice varieties,while maintained a relatively stable leaf area growth rate in Changmaogu.Propiconazole also increased root length and average root diameter,significantly increased the biomass of the seedlings,and elevated the contents of chlorophyll a,chlorophyll b,and total chlorophyll.Moreover,propiconazole significantly enhanced the net photosynthetic rate,transpiration rate,stomatal conductance,actual photochemical efficiency of PSⅡ,and electron transfer rate in both varieties.It also increased the activities of superoxide dismutase(SOD),peroxidase(POD),ascorbate peroxidase(APX),and catalase(CAT)in the leaves.In summary,foliar spraying with 20 mg·L^(-1) propiconazole can effectively promote the growth of rice seedlings and improve their physiological characteristics.