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Cryptochrome 1a of tomato modulates nutritional deficiency responses
Scientia Horticulturae ( IF 4.3 ) Pub Date : 2021-09-17 , DOI: 10.1016/j.scienta.2021.110577
Victor D'Amico-Damião 1 , Rafael Ferreira Barreto 2 , Luis Felipe de Oliveira Garcia 3 , John Silva Porto 4 , Renato de Mello Prado 3 , Rogério Falleiros Carvalho 1
Affiliation  

The blue light photoreceptor cryptochromes are involved in nutritional response pathways in plants. Evidence shows that cryptochromes mediate the control of genes related to nutrients accumulation in plants. However, nothing is known about the role of cryptochrome 1a (cry1a) in tomato (Solanum lycopersicum L.) nutritional stress responses. Thus, this study aims to evaluate the importance of cry1a photoreceptors in plant responses to nutrient deficiency. To this end, we proposed the use of a tomato mutant carrying a lesion in a gene encoding the blue light photoreceptor cry1a (cry1a) and its wild type (WT; cv. Moneymaker). Both genotypes (20-day-old plants) were grown under treatments consisting of a complete nutrient solution and the individual omission of each nutrient (–N, –P, –K, –Ca, or –S) from a balanced nutrient solution. Subsequently, we measured the growth, pigmentation, oxidative stress, and nutrient accumulation, as well as uptake efficiency, transport efficiency, and use efficiency of nutrients in all treated plants. The cry1a plants had greater shoot extension growth than WT plants in all tested growth conditions, although the shoot biomass accumulation with cry1a was greater than in the WT only under Ca omission. Except in the –N and –Ca conditions, the cry1a plants accumulated less root biomass than WT plants. In addition, leaf pigments (chlorophyll a+b and carotenoids) were reduced in the mutant plants compared to WT plants grown under CS, –P, and –S conditions. Thus, considering that WT plants have the full functions of cry1a photoreceptor, here we showed that cry1a plays an important role in the nutrient deficiency responses in tomato, particularly, mediating growth and development of stressed plants through changes in plant growth and oxidative stress, as well as the nutrient contents and efficiencies of transport use.



中文翻译:

番茄的隐花色素 1a 调节营养缺乏反应

蓝光光感受器隐花色素参与植物的营养反应途径。有证据表明,隐花色素介导了与植物养分积累相关的基因的控制。然而,关于隐花色素 1a (cry1a) 在番茄 ( Solanum lycopersicum L.) 营养应激反应中的作用尚不清楚。因此,本研究旨在评估 cry1a 光感受器在植物对营养缺乏反应中的重要性。为此,我们提议使用在编码蓝光光感受器cry1a(cry1a) 及其野生型 (WT; cv. Moneymaker)。两种基因型(20 天龄植物)均在由完整营养液和从平衡营养液中单独省略每种营养素(–N、–P、–K、–Ca 或 –S)组成的处理下生长。随后,我们测量了所有处理植物的生长、色素沉着、氧化应激和养分积累,以及养分的吸收效率、运输效率和利用效率。该的Cry1A植株比在所有测试的生长条件下野生型植物更大的枝梢生长,虽然与地上部生物量积累的Cry1A仅在CA不作为是比WT大。除了 -N 和 -Ca 条件外,cry1a植物积累的根生物量比 WT 植物少。此外,与在 CS、-P 和 -S 条件下生长的 WT 植物相比,突变植物中的叶色素(叶绿素 a+b 和类胡萝卜素)减少。因此,考虑到 WT 植物具有 cry1a 光感受器的全部功能,我们在这里表明,cry1a 在番茄营养缺乏反应中起着重要作用,特别是通过植物生长和氧化应激的变化介导受胁迫植物的生长和发育,如以及运输使用的营养成分和效率。

更新日期:2021-09-17
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