The Role of Phytochrome in Stress Tolerance

Carvalho, Rogério Falleiros; Campos, Marcelo Lattarulo; Azevedo, Ricardo Antunes

doi:10.1111/j.1744-7909.2011.01081.x

Cited by 94 publications

(64 citation statements)

References 110 publications

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“…Phytochrome mutants have revealed important roles of photoreceptors from germination to flowering, as well as in abiotic stress responses (Carvalho et al, 2011). Thus, in this work, we demonstrate that a phyA mutant of tomato exhibited varied growth and nutritional status under the omission of N, P, K, Ca, Mg and S, indicating that phyA plays a prominent role in the signaling response associated with these elements.…”

Section: Final Considerationsmentioning

confidence: 71%

Nutrition in tomato (Solanum lycopersicum L) as affected by light: revealing a new role of phytochrome A

Carvalho¹,

Moda²,

Silva³

et al. 2016

Aust J Crop Sci

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The far red light insensitive (fri) mutant of tomato, which is phytochrome A (phyA) deficient, displays some characteristics that have recently indicated important functions of this photoreceptor in water relations. With respect to the relationship between nutrition and water relations, we investigated the growth and nutritional status of fri supplied with Hoagland's complete solution and solutions with the individual omission of nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) and sulfur (S). For this purpose, 20-day-old tomato plants of the WT (cv. Moneymaker) and fri mutant were transplanted into pots (one plant per pot) that contained Hoagland and Arnon (1950) solution diluted to 50 per cent in the first week and to 100 per cent from the second week of cultivation until the end of the experiment (50 DAT O) from a balanced nutrient solution. The experiment was arranged in a completely randomized factorial design with two genotypes and seven types of nutrient solutions with three replications. Upon harvest, the following measurements were performed: the height of the plants, measured from the base of the stem of each plant to the insertion of the first fully expanded leaf; the stem diameter; the total number of leaves per plant; an indirect chlorophyll measurement, which we called the green color index, and the leaf area. Statistical analysis was performed using analysis of variance (ANOVA) followed by Tukey's test. First, based on growth analyses, fri showed an enhanced dry weight of the shoot, root and whole plant in complete solution compared with the wild type (WT). In addition, the phyA mutant had a multifaceted response compared with that of the WT when the nutrients were omitted. For the fri mutant, the height and green color index were reduced without N and K; the leaf area without P, K and S; the dry weight of the root and shoot without N, P, K and S, and the root, shoot and total plant dry weight without P, K and S. On the other hand, the green color index of the fri mutant was enhanced without Ca and Mg. Together, these results show that in addition to revealing an altered response to nutrition in the fri mutant, phyA can play a role in light signaling in the nutrition and nutritional stress of tomato.

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Section: Final Considerationsmentioning

confidence: 71%

Nutrition in tomato (Solanum lycopersicum L) as affected by light: revealing a new role of phytochrome A

Carvalho¹,

Moda²,

Silva³

et al. 2016

Aust J Crop Sci

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show abstract

“…The significant decrease in the number of xylem cells in fri plants, as well as the large number of tiny cells of xylem in tri and fri before Cd contact, were clearly noted (Table 1). It is increasingly evident that phytochromes play a key role in abiotic stress responses (Zilli et al 2008;Carvalho et al 2011a;Xie et al 2011). In this study, we used the phyA (fri), phyB1 (tri), and phyB2 (phyB2) mutants of tomato to evaluate whether some of these phytochromes were involved in plant responses to Cd stress conditions.…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, these photoreceptors have been shown to act as key modulators of both biotic and abiotic stresses (Carvalho et al 2011a;Zao et al 2014;D' Amico-Damião et al 2015). These reports have led to a series of studies exploring the molecular and biochemical basis by which phytochromes mediate stresses, such as drought (D' Amico-Damião et al 2015), salinity (Balestrasse et al 2008a), high light (Boccalandro et al 2001 or heavy metals .…”

Section: Introductionmentioning

confidence: 99%

The role of phytochromes in cadmium stress responses in tomato

et al. 2017

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“…Descobertas recentes têm demonstrado que estas moléculas também estão relacionadas com uma gama de respostas ao estresse abiótico e biótico, devido ao seu papel na regulação da transcrição de genes específicos, influenciando mecanismos bioquímicos e moleculares de sinalização celular (CARVALHO et al, 2011). A elucidação dos processos fisiológicos dependentes dos fitocromos tem sido possível por meio de mutantes específicos, tanto para a biossíntese de fotorreceptores quanto para a via de transdução de sinal desencadeada por eles.…”

Section: Introductionunclassified