Water-use efficiency and carbon isotope discrimination in two cultivars of upland rice during different developmental stages under three water regimes

Zhao, Biqiang; Kondo, Motohiko; Maeda, Morihiro; Ozaki, Yasushi; Zhang, Jiabao

doi:10.1023/b:plso.0000035562.79099.55

Cited by 64 publications

(53 citation statements)

References 32 publications

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“…The decrease in WUE of B. faberi var. microphylla seedlings under water stress, contradicts the finding with some species (Hubick et al 1986;Liu et al 2005;Maggio et al 2005), and agrees with reports on crops (Zhao et al 2004;Clavel et al 2005) and on Acacia ampliceps (Akhter et al 2005). Engelbrecht et al (2005) suggested that decreased WUE in water-stressed seedlings might be related to their root systems which are not well-established to acquire water from lower soil layers.…”

Section: Discussionsupporting

confidence: 75%

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Bao

et al. 2008

New Forests

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Responses of the endemic leguminous shrub Bauhinia faberi var. microphylla, to various soil water supply regimes were studied in order to assess water stress tolerance of seedlings. Two-month-old seedlings were grown under water supply regimes of 100, 80, 60, 40, and 20% water field capacity (FC), respectively, in a temperature and light-controlled greenhouse. Plant height and leaf number were measured monthly over a 4-month period, while water use (WU), water-use efficiency (WUE), leaf relative water content (RWC), biomass production and its partitioning were recorded at the end of the experiment. Seedlings exhibited the greatest biomass production, height, basal diameter, branch number, leaf number, and leaf area when soil content was at 100% FC, and slightly declined at 80% FC. These parameters declined significantly under 60% FC water supply, and severely reduced under 40 and 20% FC. RWC, WU and WUE decreased, while the ratio of root mass to stem mass (R:S) increased in response to decreasing water supply. Water stress caused leaf shedding, but not plant death. The results demonstrated that B. faberi var. microphylla seedlings could tolerate drought by reducing branching and leaf area while maintaining a high R:S ratio. However, low dry mass and WUE at 40 and 20% FC suggested that the seedlings did not produce significant biomass under prolonged severe water deficit. Therefore, before introducing B. faberi var. microphylla in vegetation restoration efforts, water supply above 40% FC is recommended for seedlings to maintain growth.

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Section: Discussionsupporting

confidence: 75%

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Bao

et al. 2008

New Forests

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“…This might be due to the recently formed leaves (Zhao et al 2004). At the same time, different organs differ in 13 C enrichment under these water regimes.…”

Section: Resultsmentioning

confidence: 92%

Effect of water stress on dry mass accumulation and allocation in sweet potato based on stable isotope analysis

et al. 2015

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. 2015. Effect of water stress on dry mass accumulation and allocation in sweet potato based on stable isotope analysis. Can. J. Plant Sci. 95: 263Á271. Pot experiments were conducted to study the effect of water stress on the dry mass accumulation, allocation, ribulose-1, 5-bisphosphate carboxylase/oxygenase (Rubisco) activity and stable carbon isotope composition in sweet potato (Ipomoea batatas L.). Three water regimes (50, 75 and 100% field water capacity, respectively) were investigated. Water stress effects on dry mass accumulation, allocation, gas exchange, stable carbon isotope composition and Rubisco enzyme activity were detected in sweet potato at different stages (seedling, vegetative, early maturity, and late maturity). In addition, relationships between Rubisco activity and photosynthetic rate, dry stress allocation and D 13 C under different water regimes were explored. The allocation of dry mass and D 13 C in leaves, petioles, stems and roots exhibited highest level in soil with 100% moisture content at different growth stages. The photosynthetic rate, transpiration, stomatal conductance, and RuBisCo activity of sweet potato at different growth stages also increased with increasing soil water content. The regression equations between the activity of RuBisCo and photosynthetic rate in 50, 75 and 100% field capacity were y00.675x (1.846, y 00.798x(1.370, and y 00.516x'3.887. A positive correlation between dry mass allocation and D 13 C was observed. Water stress could affect dry mass accumulation, allocation, gas exchange, RuBisCo activity, and D 13 C content in sweet potato organs during plant development stages. Incidence du stress hydrique sur l'accumulation et la re´partition de la matie`re se`che chez la patate douce d'apre`s l'analyse des isotopes stables. Can. J. Plant Sci. 95: 263Á271. Les auteurs ont effectue´des expe´riences en pot pour ve´rifier les conse´quences du stress hydrique sur l'accumulation de matie`re se`che, sa re´partition, l'activite´de la ribulose-1, 5-bisphosphate carboxylase/oxyge´nase (Rubisco) et la composition des isotopes stables du carbone chez la patate douce (Ipomoea batatas L.). Ils se sont penche´s sur trois re´gimes hydriques (50 %, 75 % et 100 % de la capacite´au champ). Les conse´quences du stress hydrique sur l'accumulation de matie`re se`che, sa re´partition, les e´changes gazeux, la composition des isotopes stables du carbone et l'activite´de l'enzyme Rubisco ont e´te´de´cele´es chez la patate douce a`diffe´rents stades (plantule, croissance ve´ge´tative, de´but de la maturite´, fin de la maturite´). Les auteurs ont e´galement examine´les liens entre l'activite´de l'enzyme Rubisco et le taux de photosynthe`se, la re´partition du stress de la se´cheresse et les isotopes D 13 C sous divers re´gimes hydriques. La re´partition de la matie`re se`che et des isotopes D 13 C dans les feuilles, les pe´tioles et les racines atteint son plus haut niveau quand la teneur en eau atteint 100 % a`diffe´rents stades de croissance. Le taux de photosynthe`se, la transpiration...

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“…Previous studies revealed the effects of stomatal conductance, leaf nitrogen and carbon content, and the ratio of intercellular to ambient CO 2 concentration (C i / C a ) on transpiration efficiency and P/T (Maruyama et al, 1985;Dingkuhn et al, 1989;Adachi et al, 1996) and also reported a negative correlation between P/T and carbon isotope discrimination (CID) (Dingkuhn et al, 1991;Kondo et al, 2004;Impa et al, 2005). However, CID showed a poor relationship with WUE, especially in the tillering period, and Zhao et al (2004) pointed out the possibility of breakdown of relationship between WUE and P/T to explain the poor relationship. In this study, stomatal conductance had no correlation with WUE probably because the P/T and transpiration efficiency, which can be affected by stomatal conductance, were a minor component of WUE in the early growth period, and stomatal conductance was high during the early growth period.…”

Section: Discussionmentioning

confidence: 99%

Role of Canopy Coverage in Water Use Efficiency of Lowland Rice in Early Growth Period in Semi-Arid Region

Suzuki

Ohta

Izumi

et al. 2013

Plant Production Science

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An appropriate combination of rice cultivar and cropping system that maximizes water use efficiency (WUE) may improve yield of rainfed lowland rice. In the paddy field, a large amount of water is consumed by evaporation during the early growth period, and it can be reduced by canopy coverage especially in semi-arid regions. Therefore, we evaluated the role of canopy coverage in WUE of rice in the early growth period in semi-arid region. A pot experiment was conducted in Namibia to investigate the genotypic and species difference in WUE, and another pot and a field experiment were conducted to investigate the effects of planting density on WUE. Although no significant difference was observed among species, the mean WUE was in the decreasing order of Oryza sativa, and Oryza glaberrima followed by the interspecific progenies including NERICA. In contrast, there was a significant difference in WUE at the genotypic level. Highly tillering genotypes such as WAB1159-2-12-11-5-1 and WITA 2 showed a high WUE. Furthermore, WUE was significantly correlated with the number of tillers (R 2 = 0.453), and higher planting density resulted in a higher WUE. In contrast, stomatal conductance had no significant correlation with WUE (R 2 = 0.081). Thus, the physical conditions affected by number of tillers and planting density had greater impacts on WUE than physiological characteristics such as stomatal conductance. The suppression of surface water evaporation by coverage was significant, probably contributing to WUE improvement. To increase WUE in semi-arid regions, we recommend the increase of canopy coverage and higher planting density.

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Water-use efficiency and carbon isotope discrimination in two cultivars of upland rice during different developmental stages under three water regimes

Cited by 64 publications

References 32 publications

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Growth, biomass partitioning, and water-use efficiency of a leguminous shrub (Bauhinia faberi var. microphylla) in response to various water availabilities

Effect of water stress on dry mass accumulation and allocation in sweet potato based on stable isotope analysis

Role of Canopy Coverage in Water Use Efficiency of Lowland Rice in Early Growth Period in Semi-Arid Region

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