Changes in osmoregulatory metabolism of cotton genotypes during water deficit and recovery period

Macedo, Erika Carla Fernandes de; Zonta, J. H.; Melo, Yuri Lima; Melo, Alberto Soares de; Silva, Duval C. da; Andrade, Wellerson Leite de

doi:10.1590/1807-1929/agriambi.v23n8p607-613

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…In general, irrigation depth treatments and foliar application of silicon during the production of wheat seeds did not influence germination and initial seedling growth, as well as seed tolerance to water stress in the germination stage and initial seedling development. However, an important strategy used to better stimulate defenses and adaptability to drought is the simulation of a recovery period, through reapplication of water (de Macêdo et al, 2019;Chen et al, 2016). Thus, a simulation of a recovery period could be an alternative to better assess the effect of tolerance on present study.…”

Section: Resultsmentioning

confidence: 99%

Silicon in wheat crop under water limitation and seed tolerance to water stress during germination

et al. 2021

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Silicon in wheat crop under water limitation and seed tolerance to water stress during germination 1 Water stress during wheat seed germination and seedling establishment for affect the percentage and speed of germination. Silicon (Si) is related to plant tolerance to different types of stress, then the application of this nutrient in the mother plant during seed production could contribute to the improvement of the seed quality and, consequently, its tolerance to stress. The aim was to evaluate the effect of foliar application of silicon on the tolerance of wheat seeds, produced under different irrigation levels, to water stress during germination and initial seedling growth. Wheat seeds were produced under three irrigation depths (0, 50 and 100% of the total required irrigation) applied after the anthesis. The silicon was supplied in two doses by foliar application (0 and 5 mM of Si). The germination and seedling growth were performed under water stress induced by PEG 6000 at the -0.2; -0.4; -0.6 MPa osmotic potentials. In addition, in the control only distilled water was used. The reduction of the osmotic potential reduced seed germination, germination speed and seedling growth. Irrigation depths, as well as foliar application of Si, during seed production did not influence the physiological quality and tolerance of seeds to water stress during germination.

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Section: Resultsmentioning

confidence: 99%

Silicon in wheat crop under water limitation and seed tolerance to water stress during germination

et al. 2021

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“…This also supported previous research: the accumulation of more sucrose in the subtending leaf is not conducive to the accumulation of cotton boll biomass (Hu et al 2015). Water replacement during the recovery period allowed cotton growth resumption (Macêdo et al 2019). In addition, leaf photosynthesis can quickly recover after re‐watering for a longer period (Luo et al 2015).…”

Section: Discussionmentioning

confidence: 99%

“…Water replacement during the recovery period allowed cotton growth resumption (Macêdo et al 2019). In addition, leaf photosynthesis can quickly recover after re-watering for a longer period (Luo et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Soil drought duration and severity affect cotton boll biomass by altering recovery times and carbon dynamics of subtending leaf

Zou

Snider

Zhu

et al. 2022

J Agronomy Crop Science

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Drought appears at flowering and boll formation for cotton frequently. However, reports on the impact of carbon dynamics in the subtending leaf on boll biomass under periodic droughts are limited. To investigate this, experiments were carried out with two cultivars (drought‐tolerant: Dexiamian 1; drought‐sensitive: Yuzaomian 9110), three water levels [soil relative water content (SRWC): control (75 ± 5)%, moderate drought (60 ± 5)%, severe drought (45 ± 5)%] and five drought durations (10, 17, 24, 31 and 38 days). A 38‐day drought declined the net photosynthetic rate of subtending leaf, which could be collectively attributed to the reduction in carboxylation with reduced ribulose‐1,5‐bisphosphate carboxylase activity, and stomal limitation with decreased stomatal conductance, along with the damage of photosynthetic apparatus with depressed maximum and actual photochemical quantum yield, leading to lower starch content. A 38‐day drought also increased the activities of sucrose phosphate synthase (SPS), sucrose synthase (Susy) and expressions of genes (GhSPS1, GhSPS2, GhSusA and GhSusB) associated with these enzymes, causing the accumulation of sucrose content, finally resulting in lower boll biomass. Some of the above parameters fully recovered under more than 17‐day moderate drought or over 10‐day severe drought, but boll biomass still decreased after re‐watering. Under 10‐day moderate drought, all aforementioned indices and boll biomass were completely recovered within 7 days of re‐watering, and the recovery capacity of Yuzaomian 9110 was lower than that of Dexiamian 1. Therefore, rapid recovery of photosynthesis and decline in the subtending leaf sucrose content to pre‐stress levels are important factors in lessening the impacts of drought on boll biomass and are indicative of cultivar tolerance to short‐term moderate water deficit.

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Environmental vulnerability index in Dipteryx alata: influence of abiotic stresses on central processes of plant physiology and metabolism

Sousa,

Menezes-Silva,

Batista

et al. 2024

Acta Physiol Plant

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Changes in osmoregulatory metabolism of cotton genotypes during water deficit and recovery period

Cited by 4 publications

References 20 publications

Silicon in wheat crop under water limitation and seed tolerance to water stress during germination

Silicon in wheat crop under water limitation and seed tolerance to water stress during germination

Soil drought duration and severity affect cotton boll biomass by altering recovery times and carbon dynamics of subtending leaf

Environmental vulnerability index in Dipteryx alata: influence of abiotic stresses on central processes of plant physiology and metabolism

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