Chickpea Genotypes Contrasting for Vigor and Canopy Conductance Also Differ in Their Dependence on Different Water Transport Pathways

Kaliamoorthy, Sivasakthi; Murugesan, Tharanya; Kholová, Jana; Muriuki, Ruth Wangari; Thirunalasundari, T.; Vadez, Vincent

doi:10.3389/fpls.2017.01663

Cited by 48 publications

(45 citation statements)

References 53 publications

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“…Later, similar results were observed in kiwi plants, where leaf area-specific conductance and g s were both higher in the low-vigor rootstocks [28]. Finally, one more study with two chickpea progenies showed the same type of behavior, being the low-vigor plants the ones with higher root hydraulic conductivity and higher transpiration rates [29]. This higher Lp r in small root systems of low-vigor plants seems to try to compensate the low biomass production, while vigorous plants, which may be less efficient per biomass unit, have bigger root systems, with more biomass accumulation, and in conclusion higher total root hydraulic conductance.…”

Section: Physiological Component Of Vigorsupporting

confidence: 66%

Studying Growth and Vigor as Quantitative Traits in Grapevine Populations

Hugalde¹,

Riaz²,

Agüero³

et al. 2019

Integrated View of Population Genetics

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Vigor is considered as a propensity to assimilate, store, and/or use nonstructural carbohydrates for producing large canopies, and it is associated with high metabolism and fast growth. Growth involves cell expansion and cell division. Cell division depends on hormonal and metabolic processes. Cell expansion occurs because cell walls are extensible, meaning they deform under the action of tensile forces, generally caused by turgor. There is increasing interest in understanding the genetic basis of vigor and biomass production. It is well established that growth and vigor are quantitative traits and their genetic architecture consists of a big number of genes with small individual effects. The search for groups of genes with small individual effects, which control a specific quantitative trait, is performed by QTL analysis and genetic mapping. Today, several linkage maps are available, like "Syrah" × "grenache," "Riesling" × "Cabernet Sauvignon," and "Ramsey" × Vitis riparia. This last progeny segregates for vigor and constituted an interesting tool for our genetic studies on growth.

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Section: Physiological Component Of Vigorsupporting

confidence: 66%

Studying Growth and Vigor as Quantitative Traits in Grapevine Populations

Hugalde¹,

Riaz²,

Agüero³

et al. 2019

Integrated View of Population Genetics

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“…In parallel work we have shown that blockers of the apoplastic pathway were indeed absorbed and a precipitate was visible in the apoplastic pathway (Sivasakthi et al 2017). Though the precipitates of apoplast blockers were not visible here the combined effect of K 4 (Fe(CN) 6 ) and CuSO 4 reduced the transpiration of PRLT-2/89-33 more than the effect of CuSO 4 alone, whereas the transpiration of H77/833-2 suffered only slightly more from the addition of K4(Fe(CN) 6 ) after Cu, indicating that the method was still valid to compare dependence on the apoplast and AQP-mediated pathways.…”

Section: Possible Caveats Of the Studymentioning

confidence: 89%

Pearl millet (Pennisetum glaucum) contrasting for the transpiration response to vapour pressure deficit also differ in their dependence on the symplastic and apoplastic water transport pathways

Murugesan

Kaliamoorthy

Bárzana

et al. 2018

Functional Plant Biol.

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Genotypic differences in transpiration rate responses to high vapour pressure deficit (VPD) was earlier reported. Here we tested the hypothesis that this limitation could relate to different degrees of dependence on the apoplastic (spaces between cells), and symplastic water transport pathways (through cells via aquaporin-facilitated transport), which are known to have different hydraulic conductivities. The low transpiration rate (Tr) genotype PRLT 2/89/33 either restricted its transpiration under high VPD, or was more sensitive to VPD than H77/833-2, when grown hydroponically or in soil. The slope of the transpiration response to an ascending series of VPD was lower in whole plants than in de-rooted shoots. In addition, the transpiration response of detached leaves to moderately high VPD (2.67 kPa), normalised against leaves exposed to constant VPD (1.27 kPa), was similar in low and high Tr genotypes. This suggested that roots hydraulics were a substantial limitation to water flow in pearl millet, especially under high VPD. The dependence on the apoplastic and symplastic water transport pathways was investigated by assessing the transpiration response of plants treated with inhibitors specific to the AQP-mediated symplastic pathway (AgNO3 and H2O2) and to the apoplastic pathway (precipitates of Cu(Fe(CN)6) or Cu(CuFe(CN)6)). When CuSO4 alone was used, Cu ions caused an inhibition of transpiration in both genotypes and more so in H77/833-2. The transpiration of high Tr H77/833-2 was decreased more by AQP inhibitors under low VPD (1.8 kPa) than in PRLT 2/89/33, whereas under high VPD (4.2 kPa), the transpiration of PRLT 2/89/33 was decreased more by AQP inhibitors than in H77/833-2. The transpiration rate of detached leaves from H77/833-2 when treated with AgNO3 decreased more than in PRLT 2/89/33. Although the root hydraulic conductivity of both genotypes was similar, it decreased more upon the application of a symplastic inhibitor in H77/833-2. The transpiration of low Tr PRLT 2/89/33 was decreased more by apoplastic inhibitors under both low and high VPD. Then the hydraulic conductivity decreased more upon the application of an apoplastic inhibitor in PRLT 2/89/33. In conclusion, both pathways contributed to water transport, and their contribution varied with environmental conditions and genotypes. Roots were a main source of hydraulic limitation in these genotypes of pearl millet, although a leaf limitation was not excluded. The similarity between genotypes in root hydraulic conductivity under normal conditions also suggests changes in this conductivity upon changes in the evaporative demand. The low Tr genotype depended more on the apoplastic pathway for water transport, whereas the high Tr genotype depended on both pathway, may be by ‘tuning-up’ the symplastic pathway under high transpiration demand, very likely via the involvement of aquaporins.

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“…Upon emergence of cotyledonary leaves after 5 days, seedlings of uniform size and without visible root injuries were transferred to modified Hoagland solution. Composition of basal nutrient solution was MgSO 4 (1mM), K 2 SO 4 (0.92 mM), CaCl 2 .2H 2 O (0.75 mM), KH 2 PO4 (0.25 mM), Fe-EDTA (0.04mM), Urea (5 mM), and micronutrients [H 3 BO 3 (2.4μM), MnSO 4 (0.9μM), ZnSO 4 (0.6μM), CuSO 4 (0.62μM), and Na 2 MoO 4 (0.6μM)] [32]. Concentration of P was maintained with two P levels: normal P (250 μM) and low P (3μM).…”

Section: Methods and Materials Plant Materials And Plant Growth Conditmentioning

confidence: 99%

Genetic variation for root architectural traits in response to phosphorus deficiency in mungbean at the seedling stage

Reddy

Aski

Mishra

et al. 2019

Preprint

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Roots enable the plant to survive in natural environment by providing anchorage and acquisition of water and nutrients. In this study, 153 mungbean genotypes were studied to compare root architectural traits under normal and low phosphorus conditions. Significant variations, medium to high heritability, near normal distribution and significant correlations were observed for studied root traits. Total root length (TRL) was positively correlated with total surface area (TSA), total root volume (TRV), total root tips (TRT) and root forks. The first two principal components explained the 79.19 % and 78.84% of the total variation under normal and low phosphorus conditions. TRL, TSA and TRV were major contributors of variation and can be utilized for screening of phosphorus uptake efficiency at seedling stage. Released Indian mungbean varieties were found to be superior for root traits than other genotypic groups. Based on comprehensive phosphorus efficiency measurement, IPM-288, TM 96-25, TM 96-2, M 1477, PUSA 1342 were found to be best five highly efficient genotypes whereas M 1131, PS-16, Pusa Vishal, M 831, IC 325828 were highly inefficient genotypes. These identified highly efficient lines are valuable genetic resources for phosphorus uptake efficiency that could be used in mungbean breeding programme.

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Chickpea Genotypes Contrasting for Vigor and Canopy Conductance Also Differ in Their Dependence on Different Water Transport Pathways

Cited by 48 publications

References 53 publications

Studying Growth and Vigor as Quantitative Traits in Grapevine Populations

Studying Growth and Vigor as Quantitative Traits in Grapevine Populations

Pearl millet (Pennisetum glaucum) contrasting for the transpiration response to vapour pressure deficit also differ in their dependence on the symplastic and apoplastic water transport pathways

Genetic variation for root architectural traits in response to phosphorus deficiency in mungbean at the seedling stage

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