Leaf recovery responses during rehydration after water deficit in two bean (<i>Phaseolus vulgaris</i>L.) cultivars

Trujillo, Iselen; Rivas, Marlene; Castrillo, M.

doi:10.1080/17429145.2012.754959

Cited by 12 publications

(12 citation statements)

References 35 publications

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“…The recovery of pigments in the tolerant cultivar after rehydration is an indication that was recovered the physiological competence, after significant losses of water fraction in tissues. Trujillo et al (2013) also observed negative impacts on the pigments of two cultivars of Phaseolus vulgaris after eight days of water deficit, and it observed a slight recovery of these parameters after one day of rehydration, corroborating the results obtained in this study.…”

Section: Discussionsupporting

confidence: 90%

Short-Time of Rehydration is not Effective to Re-Establish Chlorophyll Fluorescence and Gas Exchange in Two Cowpea Cultivars Submitted to Water Deficit

Barros

Barbosa

Lima

et al. 2017

Not Bot Horti Agrobo

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Low water supply frequently interferes on chlorophyll fluorescence and gas exchange. This study aimed to answer if a short-time of rehydration is efficient to re-establish chlorophyll fluorescence and gas exchange in cowpea plants. The experiment used four treatments (sensitive / water deficit, sensitive / control, tolerant / water deficit and tolerant / control). The sensitive and tolerant cultivars after water restriction had significant changes in gas exchange. On the third day, the stress caused lower for PN and gs in sensitive cultivar of 67% and 45%, respectively. After rehydration these parameters were not recovered significantly to two cultivars. In relation to chlorophyll fluorescence, water stress caused significant changes in all parameters evaluated of cultivars, being observed effects more intense on sensitive cultivar in the parameters Fv/Fm (38%) and Fo (69%). Rehydration did not promote recovery of the values of Fv/Fm and Fo to sensitive cultivar. Therefore, our study revealed that a short-time of rehydration is not effective to re-establish chlorophyll fluorescence and gas exchange in cowpea plants submitted to water deficit.

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Section: Discussionsupporting

confidence: 90%

Short-Time of Rehydration is not Effective to Re-Establish Chlorophyll Fluorescence and Gas Exchange in Two Cowpea Cultivars Submitted to Water Deficit

Barros

Barbosa

Lima

et al. 2017

Not Bot Horti Agrobo

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“…Reduced leaf area as response to drought is in accordance with Givnish & Vermeij () and Trujillo et al . (). For most species in our study, however, the relationship between leaf area and leaf biomass seemed to be relatively stable.…”

Section: Discussionmentioning

confidence: 97%

“…growing smaller leaves, is a typical plant response to drought of adult plants (Trujillo et al . ) and of seedlings (Koike et al . ; Wu et al .…”

Section: Introductionmentioning

confidence: 99%

Differential effect of drought regimes on the seedling performance of six floodplain grassland species

et al. 2018

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The performance of seedlings is crucial for the survival and persistence of plant populations. Although drought frequently occurs in floodplains and can cause seedling mortality, studies on the effects of drought on seedlings of floodplain grasslands are scarce. We tested the hypotheses that drought reduces aboveground biomass, total biomass, plant height, number of leaves, leaf area and specific leaf area (SLA), and increases root biomass and root-mass fraction (RMF) and that seedlings from species of wet floodplain grasslands are more affected by drought than species of dry grasslands. In a greenhouse study, we exposed seedlings of three confamilial pairs of species (Pimpinella saxifraga, Selinum carvifolia, Veronica teucrium, Veronica maritima, Sanguisorba minor, Sanguisorba officinalis) to increasing drought treatments. Within each plant family, one species is characteristic of wet and one of dry floodplain grasslands, confamilial in order to avoid phylogenetic bias of the results. In accordance with our hypotheses, drought conditions reduced aboveground biomass, total biomass, plant height, number of leaves and leaf area. Contrary to our hypotheses, drought conditions increased SLA and decreased root biomass and RMF of seedlings. Beyond the effects of the families, the results were species-specific (V. maritima being the most sensitive species) and habitat-specific. Species indicative of wet floodplain grasslands appear to be more sensitive to drought than species indicative of dry grasslands. Because of species- and habitat-specific responses to reduced water availability, future drought periods due to climate change may severely affect some species from dry and wet habitats, while others may be unaffected.

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“…In addition, the reduction of the specific leaf area, as observed in RB72910 and RB92579 varieties, indicates a strategy of acclimatization to water stress with greater potential for maintenance of crop productivity. The reduction in specific leaf area in plants under water stress indicates higher leaf thickness, which may help to maintain water in the leaf tissue, therefore, allowing a more favorable response to drought (Lopez et al, 1997;Trujillo et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…Under drought stress, plants can increase leaf thickness as a mechanism to keep more leaf water content (Lopez et al, 1997;Trujillo et al, 2013). Moreover, under these conditions, plants tend to close stomatal in an attempt to restrict water loss through transpiration (Machado et al, 2009;Medeiros et al, 2013;Ribeiro et al, 2013), which also reduces the photosynthesis (Endres et al, 2010;Sales et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Leaf thickness and gas exchange are indicators of drought stress tolerance of sugarcane

Júnior¹,

Silva

Endres

2019

Emir J Food Agric

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The frequent occurrence of prolonged droughts has become a very negative factor in the sugarcane crop production worldwide. Ratoon sugarcane, after second crop cycle, can response to drought stress is different as first crop cycle. Thus, this study aimed to investigate the biometric and physiological responses of sugarcane varieties under drought stress conditions of ratoon crop sugarcane. Our hypothesis is that some biometric and physiological characteristics of sugarcane are correlated with its drought tolerance. Six sugarcane varieties were used: 1-RB72910, 2-RB99382, 3-RB72454, 4-RB92579, 5-RB855536 and 6-RB931011, and three water treatments based on soil available water content (SAWC) and defined as: 1-control, 80 to 100% SAWC; 2-moderate water stress, 40 to 60% SAWC and 3-severe water stress, 0 to 20% SAWC. The RB92579 variety was the most tolerant to drought, with less alteration in its biometric and physiological characteristics under drought stress. On the other hand, RB72454 variety was the most affected by drought stress, with high reduction in gas exchange and plant growth. Sugarcane leaf width, specific leaf area, stomatal conductance, transpiration, photosynthesis and carboxylation efficiency were quite sensitive to changes in soil moisture and can be used by breeding programs to discriminate sugarcane varieties more tolerant to drought stress.

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Leaf recovery responses during rehydration after water deficit in two bean (Phaseolus vulgarisL.) cultivars

Cited by 12 publications

References 35 publications

Short-Time of Rehydration is not Effective to Re-Establish Chlorophyll Fluorescence and Gas Exchange in Two Cowpea Cultivars Submitted to Water Deficit

Short-Time of Rehydration is not Effective to Re-Establish Chlorophyll Fluorescence and Gas Exchange in Two Cowpea Cultivars Submitted to Water Deficit

Differential effect of drought regimes on the seedling performance of six floodplain grassland species

Leaf thickness and gas exchange are indicators of drought stress tolerance of sugarcane

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