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Response of photomorphogenic tomato mutants to nutrient omissions
Acta Physiologiae Plantarum ( IF 2.6 ) Pub Date : 2021-06-24 , DOI: 10.1007/s11738-021-03274-6
Rafael Ferreira Barreto , Luiz Cláudio Nascimento dos Santos , Renato de Mello Prado , Cid Naudi Silva Campos , Gabriel Barbosa da Silva Júnior , Cláudio Ferreira Barreto , Paulo Eduardo Teodoro , Rogério Falleiros Carvalho

Light is a critical environmental factor that influences nutrient uptake, but understanding how light acts on nutrient uptake is still very elusive. To verify the role of opposite light responses in accumulation, nutrient use efficiency (UE) and growth, a tomato cultivar Micro-Tom (MT), the non-mutant high-pigment-1 (hp1, light exaggerated response) and the mutant aurea (au, phytochrome-deficient) were grown under hydroponic conditions with a complete nutrient solution (CS) or with the individual omission (–) of N, P, K, Ca and Mg. Our results showed that in -N, hp1 exhibited high NUE in the roots and increased root dry mass. In -P, MT compensated the lower accumulation of this nutrient with the increase in PUE and produced shoot dry mass equivalent to the other genotypes with higher PUE and less PUE. In -K, the higher shoot KUE of the au was evidenced by the higher shoot dry weight in relation to the MT. In -Ca, the shoot dry weight loss of hp1 was lower in relation to the other genotypes. In -Mg, hp1 had a low shoot and root MgUE. Finally, we highlighted the perspective of utilizing hp1 in breeding programs as a tool to stimulate root growth under N deprivation conditions, hp1 for poor Ca environments, and au for poor K environments.



中文翻译:

光形态发生番茄突变体对营养缺失的反应

光是影响养分吸收的关键环境因素,但了解光如何影响养分吸收仍然非常难以捉摸。为了验证相反的光反应在积累、养分利用效率 (UE) 和生长中的作用,番茄栽培品种 Micro-Tom (MT)、非突变高色素 1hp1,光夸大反应)和突变体金黄色au,光敏色素缺乏)在具有完整营养液 (CS) 或单独省略 (-) 的 N、P、K、Ca 和 Mg 的水培条件下生长。我们的结果表明,在 -N 中,hp1在根中表现出高 NUE 和增加根干质量。在 -P 中,MT 通过 PUE 的增加补偿了这种养分的较低积累,并产生了与其他具有较高 PUE 和较低 PUE 的基因型相当的芽干质量。在 -K 中,au较高的枝条 KUE由与 MT 相关的较高枝条干重证明。在-Ca 中,与其他基因型相比,hp1的茎干重量损失较低。在 -Mg 中,hp1具有低的芽和根 MgUE。最后,我们强调了在育种计划中利用hp1作为在缺氮条件下刺激根生长的工具的观点,hp1用于贫瘠的 Ca 环境,au用于贫瘠的 K 环境。

更新日期:2021-06-24
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