Potential yield and water-use efficiency benefits in sorghum from limited maximum transpiration rate

Sinclair, Thomas R.; Hammer, Graeme; Oosterom, Erik van

doi:10.1071/fp05047

Cited by 225 publications

(201 citation statements)

References 35 publications

(36 reference statements)

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“…Reduced transpiration by stomata closing, in plants under severe soil moisture stress, may be a desirable characteristic in soybean plants cultivated without irrigation, especially in arid regions, in order to save water in the initial stages of the crop, which enables a water supply to be available for later stages when water is most needed (Sinclair et al, 2005). Therefore, since the cultivars of indeterminate habit showed greater values of stomata conductance and CO 2 assimilation, under severe drought treatment, they could also reach the wilting point more quickly.…”

Section: Resultsmentioning

confidence: 99%

Physiologic parameters of soybean of determinate and indeterminate growth habit subjected to levels of soil moisture

Júnior

Silva

Sanches

et al. 2017

Pesq. agropec. bras.

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-The objective of this work was to evaluate the physiological and production parameters of soybean (Glycine max) cultivars of determinate and indeterminate growth habits, in three levels of soil moisture. Three cultivars of determinate growth habit and three of indeterminate growth, at the beginning of the reproductive stage, were subjected to three levels of soil moisture: control, moisture at field capacity; moderated, 50% of the control level; and severe, 25% of the control level. Leaf gas exchange, xylem-water potential, chlorophyll content, chlorophyll a fluorescence, plant dry matter, and grain yield per plant were evaluated. The cultivars of indeterminate growth habit showed the greatest values for stomatal conductance and CO 2 assimilation at the severe treatment, which led to the higher water consumption, in the morning, and to the lower xylem water potential, in the afternoon; however, there was no gain of soybean dry matter. In both growth types, the intensity and duration of the severe level of soil moisture were not able to change the chlorophyll fluorescence. Soybean cultivars of both growth habits, subjected to severe levels of soil moisture from flowering to pod insertion, show no significant change for dry matter and grain yield.

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Section: Resultsmentioning

confidence: 99%

Physiologic parameters of soybean of determinate and indeterminate growth habit subjected to levels of soil moisture

Júnior

Silva

Sanches

et al. 2017

Pesq. agropec. bras.

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“…It was then argued that a lower canopy conductance would lead to higher transpiration efficiency (Sinclair et al 2005). There was indeed a close relationship between a lower TR and a higher TE under high VPD conditions and both water treatments (R 2 = 0.40 and 0.76 under WW and WS respectively; Fig.…”

Section: Genotypic Differences In the Transpiration Rate Response To mentioning

confidence: 97%

“…Therefore, in genotypes that would restrict TR, especially at high VPD, there is a scope for water saving which would then be available and essential for grain filling late in the season (Sinclair et al 2005;Ghoolipoor et al 2010;Kholova et al 2010a, b;Zaman-Allah et al 2011a, b). It was then argued that a lower canopy conductance would lead to higher transpiration efficiency (Sinclair et al 2005).…”

Section: Genotypic Differences In the Transpiration Rate Response To mentioning

confidence: 99%

Lower soil moisture threshold for transpiration decline under water deficit correlates with lower canopy conductance and higher transpiration efficiency in drought-tolerant cowpea

Belko

Zaman-Allah

Cissé

et al. 2012

Functional Plant Biol.

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This is author version post-print archived in the official Institutional Repository of ICRISAT www.icrisat.orgTerminal drought tolerance implies that plants have enough water to fill grains. Water saving traits, measured in tolerant and sensitive cowpea lines, showed that tolerant lines have developed several constitutive mechanisms, closely related to one another, which reduces the rate of water use and delay drought effects. This opens the possibility to decipher their genetic basis towards the development of drought tolerant cowpea cultivars. conditions and restricted TR more than sensitive lines under high VPD. Under WS conditions, transpiration declined at lower FTSW in tolerant than in sensitive lines. Tolerant lines also maintained higher TR and CTD under severe stress than sensitive lines. TE was higher in tolerant than in sensitive genotypes under WS conditions. Significant and close relationships were found between TR and TE, CTD, and FTSW in both environments under different water regime conditions. In sum, traits that condition how genotypes manage limited water resources discriminated tolerant and sensitive lines. Our interpretation is that a lower canopy conductance limits plant growth and plant water use, and allows tolerant lines to behave like non-stressed plants until the soil is drier and maintains a higher transpiration under severe stress. A lower TR at high VPD leads to higher transpiration efficiency.

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“…However, genotypic variation has only recently been revealed in different species such as soybean (Fletcher et al 2007;Sadok and Sinclair 2009), chickpea (Zaman-Allah et al 2011b), cowpea (Belko et al 2012), peanut (Devi et al 2010) and cereals such as sorghum (Gholipoor et al 2010) and pearl millet (Kholová et al 2010b). Crop simulation analysis has shown that this maximum rate of transpiration would have a beneficial effect on yield and also that it would lead to water saving and a higher TE (Sinclair et al 2005). In the case of cowpea, this trait was used to discriminate terminal water stress-tolerant from sensitive entries (Belko et al 2012).…”

Section: Leaf Canopy Conductancementioning

confidence: 99%

Water: the most important ‘molecular’ component of water stress tolerance research

Vadez

Kholová

Zaman-Allah

et al. 2013

Functional Plant Biol.

101

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Abstract. Water deficit is the main yield-limiting factor across the Asian and African semiarid tropics and a basic consideration when developing crop cultivars for water-limited conditions is to ensure that crop water demand matches season water supply. Conventional breeding has contributed to the development of varieties that are better adapted to water stress, such as early maturing cultivars that match water supply and demand and then escape terminal water stress. However, an optimisation of this match is possible. Also, further progress in breeding varieties that cope with water stress is hampered by the typically large genotype Â environment interactions in most field studies. Therefore, a more comprehensive approach is required to revitalise the development of materials that are adapted to water stress. In the past two decades, transgenic and candidate gene approaches have been proposed for improving crop productivity under water stress, but have had limited real success. The major drawback of these approaches has been their failure to consider realistic water limitations and their link to yield when designing biotechnological experiments. Although the genes are many, the plant traits contributing to crop adaptation to water limitation are few and revolve around the critical need to match water supply and demand. We focus here on the genetic aspects of this, although we acknowledge that crop management options also have a role to play. These traits are related in part to increased, better or more conservative uses of soil water. However, the traits themselves are highly dynamic during crop development: they interact with each other and with the environment. Hence, success in breeding cultivars that are more resilient under water stress requires an understanding of plant traits affecting yield under water deficit as well as an understanding of their mutual and environmental interactions. Given that the phenotypic evaluation of germplasm/breeding material is limited by the number of locations and years of testing, crop simulation modelling then becomes a powerful tool for navigating the complexity of biological systems, for predicting the effects on yield and for determining the probability of success of specific traits or trait combinations across water stress scenarios.

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Potential yield and water-use efficiency benefits in sorghum from limited maximum transpiration rate

Cited by 225 publications

References 35 publications

Physiologic parameters of soybean of determinate and indeterminate growth habit subjected to levels of soil moisture

Physiologic parameters of soybean of determinate and indeterminate growth habit subjected to levels of soil moisture

Lower soil moisture threshold for transpiration decline under water deficit correlates with lower canopy conductance and higher transpiration efficiency in drought-tolerant cowpea

Water: the most important ‘molecular’ component of water stress tolerance research

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