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首页> 外文期刊>Australian Journal of Crop Science >Low salt stress affects physiological parameters and sugarcane plant growth
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Low salt stress affects physiological parameters and sugarcane plant growth

机译:低盐胁迫影响生理参数和甘蔗植物生长

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Sugarcane is a renewable source for biofuel production and widely grown in tropical regions of the world. However, its cultivationmight be limited in regions with soils affected by high level of soluble salts. This work was carried out aiming to evaluate theresponse of the sugarcane cultivar IAC91-1099 to low soil salinity under pot conditions, based on the hypothesis that low salt stressaffects sugarcane growth. The experimental design was completely randomized, formed by the control treatment and 800 mg Nakg -1 soil. After twenty-five days of transplanting, the plants were submitted to the treatments and after thirty days under salinestress, the plants were harvested and the variables evaluated. Plants under salt stress presented higher Na content and Na/K ratio,and lower K content. Water status of sugarcane plants was impaired due to salt stress, expressed by lower values of stomatalconductance, relative water content and water potential. Na accumulation induced a decline on plant growth and higherelectrolyte leakage, with damage to the photochemical apparatus of photosynthesis. Although sugarcane is considered amoderately salt tolerant crop, cultivar IAC91-1099 was sensitive to the low salt stress studied, not being recommended forcultivation in regions with pronounced soluble salt soil contents.
机译:甘蔗是生物燃料生产的可再生资源,在世界热带地区广泛种植。但是,在土壤中受可溶性盐含量高的地区,其栽培能力可能受到限制。这项工作旨在基于低盐胁迫影响甘蔗生长的假设,评估盆栽条件下甘蔗品种IAC91-1099对低盐度的响应。实验设计是完全随机的,由对照处理和800 mg Nakg -1土壤组成。移植二十五天后,对植物进行处理,在盐胁迫下三十天后,收获植物并评估变量。盐胁迫下的植物表现出较高的Na含量和Na / K比,而较低的K含量。甘蔗植物的水分状况因盐胁迫而受损,表现为气孔导度,相对水分含量和水势较低。钠的积累导致植物生长的下降和较高的电解质渗漏,损害了光合作用的光化学装置。尽管甘蔗被认为是中等耐盐作物,但品种IAC91-1099对研究的低盐胁迫敏感,因此不建议在可溶性盐土含量明显的地区进行耕种。

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