Restricted transpiration may not result in improved drought tolerance in a competitive environment for water

Bacsó, Renáta; Janda, Tibor; Galiba, Gábor; Papp, I.

doi:10.1016/j.plantsci.2007.11.013

Cited by 13 publications

(9 citation statements)

References 15 publications

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“…A possible explanation is that the entry of CO 2 was less affected by stomatal conductance than was the release of water vapour. The photosynthetic rate of most plants is limited due to nonstomatal factors such as the regeneration of ribulose-1,5-bisphosphate (Farquhar and Sharkey, 1982), and a modest decrease in stomatal density does not affect photosynthesis (Bacso et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

PdEPF1 regulates water‐use efficiency and drought tolerance by modulating stomatal density in poplar

Wang

Sha

Dong

et al. 2015

Plant Biotechnology Journal

106

105

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SummaryWater deficiency is a critical environmental condition that is seriously reducing global plant production. Improved water-use efficiency (WUE) and drought tolerance are effective strategies to address this problem. In this study, PdEPF1, a member of the EPIDERMAL PATTERNING FACTOR (EPF) family, was isolated from the fast-growing poplar clone NE-19 [Populus nigra 9 (Populus deltoides 9 Populus nigra)]. Significantly, higher PdEPF1 levels were detected after induction by dehydration and abscisic acid. To explore the biological functions of PdEPF1, transgenic triploid white poplars (Populus tomentosa 'YiXianCiZhu B385') overexpressing PdEPF1 were constructed. PdEPF1 overexpression resulted in increased water deficit tolerance and greater WUE. We confirmed that the transgenic lines with greater instantaneous WUE had approximately 30% lower transpiration but equivalent CO 2 assimilation. Lower transpiration was associated with a 28% reduction in abaxial stomatal density. PdEPF1 overexpression not only strongly enhanced WUE, but also greatly improved drought tolerance, as measured by the leaf relative water content and water potential, under limited water conditions. In addition, the growth of these oxPdEPF1 plants was less adversely affected by reduced water availability than plants with a higher stomatal density, indicating that plants with a low stomatal density may be well suited to grow in water-scarce environments. Taken together, our data suggest that PdEPF1 improves WUE and confers drought tolerance in poplar; thus, it could be used to breed droughttolerant plants with increased production under conditions of water deficiency.

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Section: Discussionmentioning

confidence: 99%

PdEPF1 regulates water‐use efficiency and drought tolerance by modulating stomatal density in poplar

Wang

Sha

Dong

et al. 2015

Plant Biotechnology Journal

106

105

View full text Add to dashboard Cite

show abstract

“…2008b). Water‐saver plants, however, may not perform well in the competitive situations frequently encountered in the field (Bacsó et al. 2008a).…”

Section: Discussionmentioning

confidence: 99%

New phenotypes of the drought‐tolerant cbp20 Arabidopsis thaliana mutant have changed epidermal morphology

et al. 2010

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This paper provides a detailed phenotypic analysis of the abscisic acid (ABA) hypersensitive Cap Binding Protein 20 (cbp20) mutant. Some hitherto undescribed changes were found in the tissue structure and epidermal morphology of this mutant. These include more and smaller cells in the epidermis, a thicker cuticle and more frequent occurrence of trichomes on leaf surfaces. Some of these traits may contribute to the physiological processes responsible for the water-saving behaviour of the mutant. Abnormal spatial patterns between stomatal pore complexes were also found on various organs of the mutant. All these observations indicate profoundly disturbed development of epidermal tissue in the cbp20 mutant, which has not previously been reported for this class of mutants. A potential connection between the new phenotypes and disturbed miRNA metabolism and mRNA splicing of the mutant is discussed.

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“…Gravimetrically controlling soil water content is the most widespread method for reliably imposing a reproducible drought treatment to potted plants under controlled conditions, allowing to manage the timing, intensity and duration of the stress, therefore reducing the influence of environmental conditions and water-use rate of individual plants. This method has been successfully used in model and crop species, such as Arabidopsis thaliana (Bacs o et al 2008), sunflower (Pereyra-Irujo et al 2007), maize (Chapuis et al 2012) and soybean (Earl 2003). Correlating results obtained using controlled environment phenotyping with field performance remains one of the most important challenges in breeding for drought-tolerant crops (Passioura 2012).…”

Section: Introductionmentioning

confidence: 99%

Drought Tolerance Screening Under Controlled Conditions Predicts Ranking of Water‐Limited Yield of Field‐Grown Soybean Genotypes

Pardo

Vellicce

Aguirrezábal

et al. 2014

J Agronomy Crop Science

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Drought is a major limitation to crop yields worldwide. Screening for soybean yield under water deficit is often a bottleneck in breeding programmes. We assessed the validity of a standardized drought tolerance screening method to predict water‐limited field performance of soybean in NW Argentina. First, to determine the phenological period when yield of glasshouse‐grown plants was more sensitive to water deficit, we applied treatments during 21 days in V7, R3 or R5 stages, being the period from R5 to R6 the most critical for yield. Afterwards, two glasshouse experiments were carried out to quantify the tolerance of either eight or four genotypes, respectively, by applying a controlled water deficit of constant intensity during the critical period. Finally, yield data obtained in field trials in Argentina across several locations and seasons classified according to rainfall were analysed. Drought Susceptibility Index was calculated for each experiment and for field data, and rankings of tolerance were similar in all cases. This standardized method, which can be automated for high‐throughput phenotyping, could represent a useful tool in breeding programmes for identifying soybean cultivars with improved performance under drought conditions.

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Restricted transpiration may not result in improved drought tolerance in a competitive environment for water

Cited by 13 publications

References 15 publications

PdEPF1 regulates water‐use efficiency and drought tolerance by modulating stomatal density in poplar

PdEPF1 regulates water‐use efficiency and drought tolerance by modulating stomatal density in poplar

New phenotypes of the drought‐tolerant cbp20 Arabidopsis thaliana mutant have changed epidermal morphology

Drought Tolerance Screening Under Controlled Conditions Predicts Ranking of Water‐Limited Yield of Field‐Grown Soybean Genotypes

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