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Salinity distribution pattern and its induced adaptability of tomato roots
Scientia Horticulturae ( IF 3.9 ) Pub Date : 2023-02-11 , DOI: 10.1016/j.scienta.2023.111905
Yidan Gong , Weihua Wang , Di Tian , Bei Cheng , Ting Yang

Salinity is a major abiotic stress and threat to tomato production. Roots can attenuate salt stress at a specific salinity concentration, especially with non-uniform salinity distribution conditions, and may play a role in enhancing tomato plant adaptability to salt stress. Salt stress will also have a certain impact on root growth, which in turn affects the adaptability of crops to salt stress. Under different salt gradients, if we can find a reasonable distribution strategy, we can increase the tolerance of plants to salt stress. The hydroponics method was used and the roots were split into left and right parts. We established different salinity distribution patterns: a uniform salinity distribution T1 [0, 0], T2 [0.2%, 0.2%], and T3 [0.3%, 0.3%] and a non-uniform salinity distribution T4 [0.1%, 0.3%], T5 [0.1%, 0.5%], T6 [0.2%, 0.4%]. We observed the whole growth stage, and the plant's physiological responses to salt stress were measured. The data indicated that tomato plant roots can attenuate salt stress at a salinity concentration of 0.4%. The non-uniform salinity distribution can restrict root-uptake and uptake efficiency of nutrients (Na+, K+). Fruit yield, flavor and quality were enhanced by the non-uniform salinity distribution of T4 [0.1%, 0.3%]. Increased K+ led to a decreased Na/K ratio, which could reduce the toxicity of salt ions and improve tomato growth. The antioxidant enzyme activities of both roots and leaves of tomato plants were elevated under different salt stress patterns, indicating that the subject plants have the potential to exert adversity adaptations and that the enzyme activities are responsive to the degree of salt stress. Response of tomato fruiting stage growth and development and yield quality to different salt stresses. Growth adaptation of tomato under salt stress conditions. The above issues are discussed to provide a theoretical basis for the salt tolerance mechanism of tomatoes under non-uniform salt stress and the growth status of tomatoes on saline soils.



中文翻译:

番茄根系盐分分布规律及其诱导适应性

盐度是番茄生产的主要非生物胁迫和威胁。在特定盐度浓度下,尤其是在盐分分布不均匀的情况下,根系可以减轻盐胁迫,并可能在增强番茄植株对盐胁迫的适应性方面发挥作用。盐胁迫也会对根系生长产生一定的影响,进而影响作物对盐胁迫的适应能力。在不同的盐分梯度下,如果能找到合理的分配策略,就可以提高植物对盐胁迫的耐受性。采用水培法,将根分成左右两部分。我们建立了不同的盐度分布模式:均匀盐度分布 T 1 [0, 0]、T 2 [0.2%、0.2%] 和 T 3[0.3%, 0.3%] 和非均匀盐度分布 T 4 [0.1%, 0.3%], T 5 [0.1%, 0.5%], T 6 [0.2%, 0.4%]。我们观察了整个生长阶段,并测量了植物对盐胁迫的生理反应。数据表明,在 0.4% 的盐度浓度下,番茄植物的根系可以减轻盐胁迫。盐度分布不均匀会制约根系对养分(Na +、K +)的吸收和吸收效率。T 4 [0.1%, 0.3%]的非均匀盐度分布提高了果实产量、风味和品质。K +增加导致Na/K降低比,可降低盐离子的毒性,促进番茄生长。不同盐胁迫模式下番茄植株根和叶的抗氧化酶活性均升高,表明植株具有逆境适应能力,酶活性对盐胁迫程度有响应。番茄果期生长发育及产量品质对不同盐胁迫的响应[J]. 番茄在盐胁迫条件下的生长适应性。对上述问题进行探讨,为番茄在非均匀盐胁迫下的耐盐机制及番茄在盐渍土上的生长状况提供理论依据。

更新日期:2023-02-12
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