Deep Root Water Uptake Ability and Water Use Efficiency of Pearl Millet in Comparison to Other Millet Species

Zegada‐Lizarazu, Walter; Iijima, Morio

doi:10.1626/pps.8.454

Cited by 86 publications

(39 citation statements)

References 30 publications

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“…C 4 plants exhibit a negative correlation between carbon isotope discrimination and WUE; therefore, the consistently lower carbon isotope ratios found in E. coracana than in P. glaucum could be explained by greater WUE in E. coracana . In a study directly comparing WUE among millets, however, P. glaucum was found to have greater WUE than E. coracana across a range of conditions (waterlogged, well‐watered, and draught conditions), contradicting this hypothesis. Lower δ 13 C values in C 4 grasses have also been correlated with increased photosynthesis, growth, and yield, but all three of these can vary with local environmental conditions, making it challenging to determine the reason behind species differences without conducting a greenhouse or growth chamber experiment in which the species are subjected to the same conditions.…”

Section: Discussionmentioning

confidence: 95%

Carbon and nitrogen isotope variability in the seeds of two African millet species: Pennisetum glaucum and Eleusine coracana

Reid

Lalk

Marshall

et al. 2018

Rapid Comm Mass Spectrometry

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The importance of both temperature and precipitation as predictors of δ C and δ N values in millets suggests that C plants may be more sensitive to environmental parameters than previously appreciated. Given the high degree of carbon and nitrogen isotope variability among accessions of these species, it is imperative that site-relevant plant isotope ratios are used for making isotope-based paleo-dietary predictions.

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Section: Discussionmentioning

confidence: 95%

Carbon and nitrogen isotope variability in the seeds of two African millet species: Pennisetum glaucum and Eleusine coracana

Reid

Lalk

Marshall

et al. 2018

Rapid Comm Mass Spectrometry

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“…Previous studies have also shown that drought can increase soil compaction and reduces the water uptake ability of deep roots (Zegada-Lizarazu and Iijima 2005;Iijima et al 2007) and also enhance root competition for existing soil water (Zegada-Lizarazu et al 2006). As the availability of water in soil becomes a key factor limiting growth and survival of plants (Liste and White 2008), the deeper root system of T. repens and R. obtusifolius as compared to grasses may represent a competitive advantage to access soil water.…”

Section: Discussionmentioning

confidence: 99%

Effects of an extended drought period on physiological properties of grassland species in the field

Signarbieux

Feller

2011

J Plant Res

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A very high percentage (around 70%) of the agronomic area in Switzerland is covered by grasslands at various altitudes where environmental conditions, management, community structure and productivity vary widely. As heat waves and drought are predicted to increase in future climate, survival of plant species in grasslands is a major issue of concern in Central Europe. The effect of summer drought on representative grasslands in Switzerland was studied through drought experiments (using rain-out shelters avoiding natural precipitation) to understand the response of predominant species to changed climatic conditions. The physiological performance (gas exchange, leaf water potential) of selected species was investigated at three locations in Switzerland. The predawn leaf water potential of all species was lower (more negative) under the dryer conditions at the three sites. Net photosynthesis and stomatal conductance of forb and legume species did not show major changes under drought, while grass species showed large decreases at the lowland site. These differences between forb-legume and grass species were not observed at the pre-alpine and alpine site. The apparent drought tolerance of the forb-legume species seems to be due-at least partially-to increased water use efficiency under drought conditions.

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“…7h) by a balanced vegetative use is imperative to save sufficient soil moisture for grain filling (Kholová et al 2010;Zaman-Allah et al 2011). Among crops with C 4 photosynthesis having a generally high water-use efficiency (Brown 1999), pearl millet is most drought resistant, which was related to a constitutively low water use and highest water-use efficiency under severe drought (Singh and Singh 1995;Zegada-Lizarazu and Iijima 2005). Here, also the whole crop rotation has to be considered.…”

Section: Plant Resistance To Droughtmentioning

confidence: 99%

Management of crop water under drought: a review

Bodner

Nakhforoosh

Kaul

2015

Agron. Sustain. Dev.

455

234

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Drought is a predominant cause of low yields worldwide. There is an urgent need for more water efficient cropping systems facing large water consumption of irrigated agriculture and high unproductive losses via runoff and evaporation. Identification of yield-limiting constraints in the plant-soil-atmosphere continuum are the key to improved management of plant water stress. Crop ecology provides a systematic approach for this purpose integrating soil hydrology and plant physiology into the context of crop production. We review main climate, soil and plant properties and processes that determine yield in different water-limited environments. From this analysis, management measures for cropping systems under specific drought conditions are derived. Major findings from literature analysis are as follows. (1) Unproductive water losses such as evaporation and runoff increase from continental in-season rainfall climates to storage-dependent winter rainfall climates. Highest losses occur under tropical residual moisture regimes with short intense rainy season. (2) Sites with a climatic dry season require adaptation via phenology and water saving to ensure stable yields. Intermittent droughts can be buffered via the root system, which is still largely underutilised for better stress resistance. (3) At short-term better management options such as mulching and date of seeding allow to adjust cropping systems to site constraints. Adapted cultivars can improve the synchronisation between crop water demand and soil supply. At long term, soil hydraulic and plant physiological constraints can be overcome by changing tillage systems and breeding new varieties with higher stress resistance. (4) Interactions between plant and soil, particularly in the rhizosphere, are a way towards better crop water supply. Targeted management of such plant-soil interactions is still at infancy.We conclude that understanding site-specific stress hydrology is imperative to select the most efficient measures to mitigate stress. Major progress in future can be expected from crop ecology focussing on the management of complex plant (root)-soil interactions.

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Deep Root Water Uptake Ability and Water Use Efficiency of Pearl Millet in Comparison to Other Millet Species

Cited by 86 publications

References 30 publications

Carbon and nitrogen isotope variability in the seeds of two African millet species: Pennisetum glaucum and Eleusine coracana

Carbon and nitrogen isotope variability in the seeds of two African millet species: Pennisetum glaucum and Eleusine coracana

Effects of an extended drought period on physiological properties of grassland species in the field

Management of crop water under drought: a review

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