The enhanced drought tolerance of rice plants under ammonium is related to aquaporin (AQP)

Ding, Lipeng; Gao, Cuimin; Li, Yingrui; Li, Yong; Zhu, Yiyong; Xu, Guohua; Shen, Qirong; Kaldenhoff, Ralf; Lou, Kai; Guo, Shiwei

doi:10.1016/j.plantsci.2015.01.016

Cited by 109 publications

(74 citation statements)

References 53 publications

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“…Furthermore, Henry et al [40] suggested that limiting root water uptake capacity might be a sensible choice for rice to improve water retention capacity under aerobic conditions. However, higher root hydraulic conductivity of rice under aerobic conditions has been reported repeatedly [66–68]. In particular, along with significantly smaller fine to coarse root ratio and specific root length, root water uptake capacity of rice under aerobic conditions was previously found to be 131% of that under TPRPS [45], which is comparable with the experimental findings in this study (Figs 3–5 and 9).…”

Section: Discussionsupporting

confidence: 91%

Characterizing roots and water uptake in a ground cover rice production system

Zuo

Wang

et al. 2017

PLoS ONE

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Background and aimsWater-saving ground cover rice production systems (GCRPS) are gaining popularity in many parts of the world. We aimed to describe the characteristics of root growth, morphology, distribution, and water uptake for a GCRPS.MethodsA traditional paddy rice production system (TPRPS) was compared with GCRPS in greenhouse and field experiments. In the greenhouse, GCRPS where root zone average soil water content was kept near saturation (GCRPSsat), field capacity (GCRPSfwc) and 80% field capacity (GCRPS80%), were evaluated. In a two-year field experiment, GCRPSsat and GCRPS80% were applied.ResultsSimilar results were found in greenhouse and field experiments. Before mid-tillering the upper soil temperature was higher for GCRPS, leading to enhanced root dry weight, length, surface area, specific root length, and smaller diameter of roots but lower water uptake rate per root length compared to TPRPS. In subsequent growth stages, the reduced soil water content under GCRPS caused that the preponderance of root growth under GCRPSsat disappeared in comparison to TPRPS. Under other GCRPS treatments (GCRPSfwc and GCRPS80%), significant limitation on root growth, bigger root diameter and higher water uptake rate per root length were found.ConclusionsDiscrepancies in soil water and temperature between TPRPS and GCRPS caused adjustments to root growth, morphology, distribution and function. Even though drought stress was inevitable after mid-tillering under GCRPS, especially GCRPS80%, similar or even enhanced root water uptake capacity in comparison to TPRPS might promote allocation of photosynthetic products to shoots and increase water productivity.

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Section: Discussionsupporting

confidence: 91%

Characterizing roots and water uptake in a ground cover rice production system

Zuo

Wang

et al. 2017

PLoS ONE

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“…In rice plants, ammonium could increase the expression of PIP and TIP genes in the roots and resulted in a higher water uptake rate compared with that of nitrate (Figure 1a). Under water stress, ammonium increased drought tolerance of rice plants by inducing aquaporin expression and/or activity, which corresponded with increased root water uptake ability [58]. However, in French bean plants with a ‘one shoot-two roots’ split root system, Guo et al [59] demonstrated that the mRNA expression of PIP1 was higher in the roots supplied with nitrate than those supplied with ammonium (Figure 1b).…”

Section: Nitrogen (N)mentioning

confidence: 99%

The Interactions of Aquaporins and Mineral Nutrients in Higher Plants

Wang

Ding

Gao

et al. 2016

IJMS

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Aquaporins, major intrinsic proteins (MIPs) present in the plasma and intracellular membranes, facilitate the transport of small neutral molecules across cell membranes in higher plants. Recently, progress has been made in understanding the mechanisms of aquaporin subcellular localization, transport selectivity, and gating properties. Although the role of aquaporins in maintaining the plant water status has been addressed, the interactions between plant aquaporins and mineral nutrients remain largely unknown. This review highlights the roles of various aquaporin orthologues in mineral nutrient uptake and transport, as well as the regulatory effects of mineral nutrients on aquaporin expression and activity, and an integrated link between aquaporins and mineral nutrient metabolism was identified.

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“…These proteins respond to water availability in a timely manner (Ding et al, 2015) and the exploration of the AQP responses to drought will help improve plant water use efficiency (Hu et al, 2012; Moshelion et al, 2015). AQPs belong to a large family of major intrinsic proteins (MIPs), and are categorized into four clades, namely plasma membrane intrinsic proteins (PIPs), tonoplast intrinsic proteins, small basic intrinsic proteins, and nodulin 26-like intrinsic proteins (Baiges et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Roles of Plasmalemma Aquaporin Gene StPIP1 in Enhancing Drought Tolerance in Potato

et al. 2017

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Survival and mortality of plants in response to severe drought may be related to carbon starvation, but little is known about how plasma membrane intrinsic proteins may help alleviate the drought-induced damage. Here, we determined the roles of plasmalemma aquaporin gene in improving plant water status, maintaining carbon accumulation, and thereby enhancing drought tolerance. Seven StPIP1 transformed potato (Solanum tuberosum L.) lines (namely T1, T2…T7) were compared with non-transgenic control plant at molecule and whole-plant levels. The relative expression of StPIP1 gene was found in leaves, stems and roots, with the most abundant expression being in the roots. The transgenic lines T6 and T7 had the highest StPIP1 expression, averaging 7.2 times that of the control and the greatest differences occurred 48 h after mannitol osmotic stress treatment. Using an evaluation index to quantifying the degree of drought tolerance, we found that the StPIP1 transgenic lines T6 and T7 had the highest drought tolerance, averaging 8.5 times that of the control. Measured at 30 days in drought stress treatment, the control plant decreased net photosynthetic rate by 33 and 56%, respectively, under moderate and severe stresses; also decreased stomatal conductance by 39 and 65%; and lowered transpiration rate by 49 and 69%, compared to the no-stress treatment, whereas the transgenic lines T6 and T7 maintained a relatively stable level with slight decreases in these properties. The constitutive overexpression of StPIP1 in potato improved plant water use efficiency and increased nonstructural carbohydrate concentration, which helped alleviate carbon starvation and minimized the loss of biomass and tuber yield due to drought stress. We conclude that the expression of StPIPs improves overall water relations in the plant and helps maintain photosynthesis and stomatal conductance; these help minimize carbon starvation and enhance the whole plant tolerance to drought stress.

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The enhanced drought tolerance of rice plants under ammonium is related to aquaporin (AQP)

Cited by 109 publications

References 53 publications

Characterizing roots and water uptake in a ground cover rice production system

Characterizing roots and water uptake in a ground cover rice production system

The Interactions of Aquaporins and Mineral Nutrients in Higher Plants

Roles of Plasmalemma Aquaporin Gene StPIP1 in Enhancing Drought Tolerance in Potato

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