Thresholds for chickpea leaf expansion and transpiration response to soil water deficit

Soltani, Afshin; Khooie, F.R; Ghassemi‐Golezani, Kazem; Moghaddam, Mohammad

doi:10.1016/s0378-4290(00)00122-2

Cited by 67 publications

(42 citation statements)

References 16 publications

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“…Root growth simulation studies have not only confirmed the importance of deeper root systems and root proliferation on grain yield across several years and environments in USA (Sinclair 1994) but also on chickpea under Iranian conditions (Soltani et al 1999). The chickpea simulation studies have also showed that early maturity, increasing drought avoidance through deep and profuse root system and higher transpiration efficiency were the traits most likely to result in higher yield under terminal DS (Soltani et al 2000). At the same time, as experienced in wheat, excessive root growth early in the growing season can also be counterproductive for increased yield production by exhausting soil water reserves before the plant is able to complete its life cycle (Richards and Passioura 1989).…”

Section: Introductionmentioning

confidence: 88%

Genotypic variation in soil water use and root distribution and their implications for drought tolerance in chickpea

Ramamoorthy

Krishnamurthy

Upadhyaya

et al. 2017

Functional Plant Biol.

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Abstract. Chickpeas are often grown under receding soil moisture and suffer~50% yield losses due to drought stress. The timing of soil water use is considered critical for the efficient use of water under drought and to reduce yield losses. Therefore the root growth and the soil water uptake of 12 chickpea genotypes known for contrasts in drought and rooting response were monitored throughout the growth period both under drought and optimal irrigation. Root distribution reduced in the surface and increased in the deep soil layers below 30 cm in response to drought. Soil water uptake was the maximum at 45-60 cm soil depth under drought whereas it was the maximum at shallower (15-30 and 30-45 cm) soil depths when irrigated. The total water uptake under drought was 1-fold less than optimal irrigation. The amount of water left unused remained the same across watering regimes. All the drought sensitive chickpea genotypes were inferior in root distribution and soil water uptake but the timing of water uptake varied among drought tolerant genotypes. Superiority in water uptake in most stages and the total water use determined the best adaptation. The water use at 15-30 cm soil depth ensured greater uptake from lower depths and the soil water use from 90-120 cm soil was critical for best drought adaptation. Root length density and the soil water uptake across soil depths were closely associated except at the surface or the ultimate soil depths of root presence.

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Section: Introductionmentioning

confidence: 88%

Genotypic variation in soil water use and root distribution and their implications for drought tolerance in chickpea

Ramamoorthy

Krishnamurthy

Upadhyaya

et al. 2017

Functional Plant Biol.

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“…This trait is important because genotypes with high FTSW thresholds begin to partially close their stomata at a relatively high soil water content and hence save water. A simulation study has shown that this trait would lead to a significant soybean yield increase in the USA, especially in years classified as dry , although the same trait has been reported to have only a limited impact on chickpea yields (Soltani et al 2000). Fig.…”

Section: Transpiration Response To Soil Humiditymentioning

confidence: 98%

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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“…The assumption behind the RAW concept is that physiological processes (Tr, photosynthesis and leaf expansion) have similar responses across a wide range of environmental conditions if they were compared using TAW. Soltani et al [66] reported that this concept was refined by Sinclair and Ludlow [67] providing descriptions of responses of various physiological processes to soil water deficit in a consistent way.…”

Section: Traditional Irrigation Scheduling Assumptions: the Readily Amentioning

confidence: 99%

Stress Coefficients for Soil Water Balance Combined with Water Stress Indicators for Irrigation Scheduling of Woody Crops

Ferreira

2017

Horticulturae

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There are several causes for the failure of empirical models to estimate soil water depletion and to calculate irrigation depths, and the problem is particularly critical in tall, uneven, deficit irrigated (DI) crops in Mediterranean climates. Locally measured indicators that quantify water status are useful for addressing those causes and providing feed-back information for improving the adequacy of simple models. Because of their high aerodynamic resistance, the canopy conductance of woody crops is an important factor in determining evapotranspiration (ET), and accurate stress coefficient (Ks) values are needed to quantify the impact of stomatal closure on ET. A brief overview of basic general principles for irrigation scheduling is presented with emphasis on DI applications that require Ks modelling. The limitations of existing technology related to scheduling of woody crops are discussed, including the shortcomings of plant-based approaches. In relation to soil water deficit and/or predawn leaf water potential, several woody crop Ks functions are presented in a secondary analysis. Whenever the total and readily available water data were available, a simple Ks model was tested. The ultimate aim of this discussion is to illustrate the central concept: that a combination of simple ET models and water stress indicators is required for scheduling irrigation of deep-rooted woody crops.

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Thresholds for chickpea leaf expansion and transpiration response to soil water deficit

Cited by 67 publications

References 16 publications

Genotypic variation in soil water use and root distribution and their implications for drought tolerance in chickpea

Genotypic variation in soil water use and root distribution and their implications for drought tolerance in chickpea

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

Stress Coefficients for Soil Water Balance Combined with Water Stress Indicators for Irrigation Scheduling of Woody Crops

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