Applying ‘drought’ to potted plants by maintaining suboptimal soil moisture improves plant water relations

Puértolas, Jaime; Larsen, Elisabeth K.; Davies, W. J.; Dodd, Ian C.

doi:10.1093/jxb/erx116

Cited by 54 publications

(46 citation statements)

References 45 publications

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“…Nevertheless, the leaves stems and roots had significantly different values of RWC with leaves and stems having a higher RWC at 82-84% than the roots at 79% RWC. As leaves, stems and roots were taken as a whole for RWC measurement, the lower RWC in the roots is contrary to the normal gradient in a transpiring plant [29], probably reflecting the expected gradient in SWC down the pot from high SWC near the surface to low SWC at the base as a result of the daily watering from the top [30]. However, the lower RWC in the roots may have been temporary and the RWC of the leaves in the afternoon may have been considerably lower than when measured in the morning.…”

Section: Discussionmentioning

confidence: 97%

Roots of Lucerne Seedlings are More Resilient to a Water Deficit than Leaves or Stems

et al. 2019

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Drought is one of the most harmful environmental stresses affecting the physiological, biochemical processes and growth of plants. Lucerne or alfalfa (Medicago sativa L.), one of the most popular pasture species in arid and semi-arid regions, plays a critical role in sustaining agricultural systems in many areas of the world. In order to evaluate the effect of water shortage on water status, biomass distribution and proline content, the relative water content (RWC), biomass and proline concentration in the leaves, stems and roots of lucerne seedlings under three different water regimes were studied in pots under a rainout shelter. The results showed that after water was withheld, the RWC of the different organs decreased significantly; at the same soil water content, the leaf RWC was higher than that of the stem and root. The biomass of the leaves, stems and roots were all reduced by water stress, while the root–shoot ratio increased indicating that the roots were less affected than the leaves and stems. Proline concentration increased with decreasing soil water content with the leaf proline concentration increasing more than that of stems and roots. These results indicate that roots of lucerne seedlings show greater resilience to water deficits than shoots.

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Section: Discussionmentioning

confidence: 97%

Roots of Lucerne Seedlings are More Resilient to a Water Deficit than Leaves or Stems

et al. 2019

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“…6). Although daily irrigation increases leaf 579 water status and decreases ABA accumulation of plants exposed to reduced soil water 580 availability (Puértolas et al, 2017), significantly higher water consumption of Arabidopsis 581 between Days 3 and 7 ( Fig. 1) increased ABA accumulation on Day 5 ( Fig.…”

Section: Eutrema Responds With Small Changes To Early Drought 547mentioning

confidence: 99%

Distinctive phytohormonal and metabolic profiles of Arabidopsis thaliana and Eutrema salsugineum under similar soil drying

Pinheiro

Dickinson

Marriott

et al. 2019

Planta

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“…A maintenance suboptimal soil water content alters the plants water relations (Puértolas, Larsen, Davies, & Dodd, 2017), which was evidenced by the reduction in relative water content and water potential (ψ w foliar ) in plants grown with 20% of water availability (Figure 2). The relative water content in the leaf remained constant up to 40% of the field capacity, indicating that even under conditions of moderate water deficit, the species can keep its cells hydrated, despite differences in gas exchange (Figure 2a).…”

Section: Plant Water Relationsmentioning

confidence: 99%

Physiological Responses of Physalis angulata Plants to Water Deficit

Leite¹,

Nascimento²,

Tanan³

et al. 2018

JAS

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It’s known that drought affects crop growth, however, little is known about the physiological responses developed under these conditions by underexploited species, such as Physalis angulata. This study aimed at assessing the physiological responses of Physalis angulata plants after 40 days under different water availability (100%, 80%, 60%, 40% and 20% of pot field capacity). In this research, the effects of the water deficit on the relative water content, water potential, gas exchange, sugars accumulation and activity of nitrate reductase were evaluated. Water relations were affected mainly in plants under severe water deficit, however, the variables remained stable when cultivated at sub-optimal levels of field capacity. Gas exchanges were also affected by water deficit, with reduction in carbon assimilation, internal carbon, stomatal conductance and transpiration, as well as increased leaf temperature and water use efficiency. Plants accumulated sugars as a mechanism of tolerance to severe water deficit, while nitrate reductase activity was reduced. P. angulata plants develop important strategies to tolerate water deficit, contributing to the establishment of crops under low water availability.

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Applying ‘drought’ to potted plants by maintaining suboptimal soil moisture improves plant water relations

Abstract: HighlightHigh-frequency deficit irrigation to maintain sustained low soil moisture results in wet upper soil layers which increase bulk root water potential and diminish ABA levels.

Cited by 54 publications

References 45 publications

Roots of Lucerne Seedlings are More Resilient to a Water Deficit than Leaves or Stems

Roots of Lucerne Seedlings are More Resilient to a Water Deficit than Leaves or Stems

Distinctive phytohormonal and metabolic profiles of Arabidopsis thaliana and Eutrema salsugineum under similar soil drying

Physiological Responses of Physalis angulata Plants to Water Deficit

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