Moisture-deficit-induced changes in leaf-water content, leaf carbon exchange rate and biomass production in groundnut cultivars differing in specific leaf area

Nautiyal, Prakash; Rachaputi, Rao C. N.; Joshi, Yogesh

doi:10.1016/s0378-4290(01)00199-x

Cited by 137 publications

(80 citation statements)

References 13 publications

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“…Reducing specific leaf area in response to water deficit stress to conserve water has been documented across crop species (Rao and Wright, 1994;Araus et al, 1997;Craufurd et al, 1999;Nautiyal et al, 2002), and the same was observed with wheat cultivars (Fig. 1A).…”

Section: Reduced Specific Leaf Area Is a Determining Factor For Incresupporting

confidence: 68%

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

et al. 2015

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District of Columbia 20005 (P.S.B.)Water scarcity and the increasing severity of water deficit stress are major challenges to sustaining irrigated rice (Oryza sativa) production. Despite the technologies developed to reduce the water requirement, rice growth is seriously constrained under water deficit stress compared with other dryland cereals such as wheat (Triticum aestivum). We exposed rice cultivars with contrasting responses to water deficit stress and wheat cultivars well adapted to water-limited conditions to the same moisture stress during vegetative growth to unravel the whole-plant (shoot and root morphology) and organ/tissue (root anatomy) responses. Wheat cultivars followed a water-conserving strategy by reducing specific leaf area and developing thicker roots and moderate tillering. In contrast, rice 'IR64' and 'Apo' adopted a rapid water acquisition strategy through thinner roots under water deficit stress. Root diameter, stele and xylem diameter, and xylem number were more responsive and varied with different positions along the nodal root under water deficit stress in wheat, whereas they were relatively conserved in rice cultivars. Increased metaxylem diameter and lower metaxylem number near the root tips and exactly the opposite phenomena at the rootshoot junction facilitated the efficient use of available soil moisture in wheat. Tolerant rice 'Nagina 22' had an advantage in root morphological and anatomical attributes over cultivars IR64 and Apo but lacked plasticity, unlike wheat cultivars exposed to water deficit stress. The key traits determining the adaptation of wheat to dryland conditions have been summarized and discussed.Among cereals, rice (Oryza sativa) and wheat (Triticum aestivum) are the most important staple food crops, and they belong to the family Poaceae. These two cereals share a common ancestor and diverged about 65 million years ago (Sorrells et al., 2003). Rice eventually developed strong adaptation potential for fully flooded conditions across tropical to temperate environments, while wheat became well adapted to aerobic conditions mostly restricted to temperate environments. Rice, with a semiaquatic behavior, consumes about 30% of the total fresh water available for agricultural crops worldwide, which equates to a 2-to 3-fold higher consumption than other cereals such as wheat and maize (Zea mays; Peng et al., 2006). Despite a significantly lower water requirement, the potential yield of wheat in a favorable environment (9 tons ha 21 ) is comparable with the yield of fully flooded rice (9 tons ha 21 ) in the dry season at the International Rice Research Institute (IRRI; Fischer and Edmeades, 2010). Hence, rice records very low water productivity compared with wheat and other dryland cereals. Because of growing concerns about water scarcity and the increased frequency and magnitude of water deficit stress events under current and future climates, increasing or even sustaining rice yield under fully flooded conditions is highly challenging. To minimize the total water requ...

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Section: Reduced Specific Leaf Area Is a Determining Factor For Incresupporting

confidence: 68%

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

et al. 2015

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“…These surrogate traits for transpiration efficiency have been widely used and recommended for drought tolerance screening (Nageswara Rao et al, 2001;Nautiyal et al, 2002;Bindu Madhava et al, 2003;Nigam et al, 2005;Sheshshayee et al, 2006;Upadhyaya, 2005). However, more recent report shows that care should be taken in their use (Krushnamurthy et al, 2007;Devi et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Unpredictable and intermittent periods of water deficit commonly occur during its growth period (Vorasoot et al, 2003). Drought stress has depressive effects on groundnut productivity (Nageswara Rao et al, 1989;Nautiyal et al, 2002, Nigam et al, 2005, Songsri et al, 2008. The depressive effect of drought on growth and yield components depends on the time, the intensity and/or the duration of drought stress (Nautiyal et al, 2002;Nigam et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…Drought stress has depressive effects on groundnut productivity (Nageswara Rao et al, 1989;Nautiyal et al, 2002, Nigam et al, 2005, Songsri et al, 2008. The depressive effect of drought on growth and yield components depends on the time, the intensity and/or the duration of drought stress (Nautiyal et al, 2002;Nigam et al, 2005). Intermittent drought, which is an episodic water deficit during plant growth, is the most prevalent drought type affecting groundnut production in the rain-fed regions of SAT and remains a major limiting factor in groundnut productivity, evaluated to 500 million US$ every year (Sharma and Lavanya, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Selection of intermittent drought tolerant lines across years and locations in the reference collection of groundnut (Arachis hypogaea L.)

Falalou

Ratnakumar

Halilou³

et al. 2012

Field Crops Research

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Intermittent drought is the most important yield limiting factor affecting groundnut (Arachis hypogaea L) production in rain-fed regions of Sub-Saharan Africa and Asia.Improvement of crop adaptation to drought is needed and this starts by having a thorough assessment of a large and representative set of germplasm. In this study, 247 lines belonging to the reference collection of groundnut were assessed under well-watered (WW) and intermittent water stress (WS) conditions in India and Niger for two years, following similar experimental protocols. The WS treatment reduced pod yield (31-46%), haulm yield (8-55%) and the harvest index (1-10%). Besides a strong treatment effect, yield differences within locations and years, were attributed to both genotypic and genotype-by-treatment interactions. Pod yield under WW and WS conditions were closely related in both years (Patancheru, r 2 = 0.42 and r 2 = 0.50; Sadore, r 2 = 0.22 and r 2 = 0.23). By contrast, within location and treatment, pod and haulm yields were affected predominantly by genotype-by-year (G x Y) effects, especially under WS. Within treatment across locations and years, pod and haulm yields were mostly ruled by genotypic effects, which allowed identifying a group of entries with contrasting pod yield across locations under WS. However, genotype and genotype by environment (GGE) biplot analyses distinguished India from Niger, suggesting that the selection remains environment-specific and also revealed dissimilarity between years in Niger. A close relationship was observed between yield and pod growth rate (r 2 = 0.51), and partition (r 2 = 0.33) under WS conditions, whereas no significant relationship was found between yield under WS and SCMR, or specific leaf area (SLA). These results showing a close interaction between the environmental conditions and the genotypic response to intermittent drought shows the necessity to carefully choose environments that truly represent target environments. This is an important result in the current breeding context of marker-assisted recurrent selection or genome-wide selection. This work opens also new ways for the breeding of drought tolerant groundnut, by bringing new highly contrasting lines currently used for crossing and deciphering drought adaptation traits to better understand GxE interactions, while it challenges the relevance of long-time used surrogates such as SCMR or SLA.

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“…The photosynthesis is fundamental in both biomass accumulation and productivity and it could be best utilized in identifying the efficient genotypes and to understand the physiological traits of productivity both under normal and stress conditions. Under increasing moisture deficit, the low SLA type peanut genotypes were able to maintain higher RWC, P N and g s (Nautiyal et al 2002). In general, the limitation of net photosynthetic rate in low moisture stressed plant is mainly through stomatal closure (Cornic and Massacci 1996) and/or by metabolic impairment (Flexas and Medrano 2002), however, the severity of drought decides the relative magnitude of stomatal and non-stomatal factors limiting photosynthesis.…”

Section: Discussionmentioning

confidence: 98%

Photosynthetic characteristics of peanut genotypes under excess and deficit irrigation during summer

Kalariya

Singh

Goswami

et al. 2015

Physiol Mol Biol Plants

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In a field experiment three irrigation treatments were given to twelve peanut genotypes through drip. At 80 days after sowing (DAS) the amount of irrigation applied was 20 % higher than the evaporative demand (ET) in T 1 , 25 % less than ET in T 2 and 48 % less than ET in T 3 against the cumulative evaporative demand of 412 mm. The relative water content (RWC) of peanut leaves reduced by cutting irrigation from 93.5 % in T 1 to 91.1 % in T 2 and 77.2 % in T 3 but, net photosynthetic rate (P N ) was higher in T 2 (29.6 μmol m -2 s ) which was statistically at par with GG 20, ICGV 86590, TAG 24, SB XI, TMV 2 and TPG 41. The nonphotochemical quenching (NPQ) varied with different irrigation treatment with lowest in T 2 and highest in T 3 . The deepoxidation state (DeS) was 38 % in T 1 and T 2 but, increased to 47 % in T 3 due to the sever water deficit stress. Applying 20 % higher irrigation than the ET demand (T 1 ) does not warrant any extra benefits in terms of higher photosynthesis in peanut at 75-80 DAS. Further, a reduction of 25 % of the ET (T 2 ) in peanut seems to be the ideal condition for photosynthesis and desirable chlorophyll fluorescence parameters at 80 DAS. Girnar 3 and ICGV 91114 showed NPQ value above 2.2 and higher de-epoxidation state, maintained least deviation in Fv/Fm and Fv'/Fm' under severe water deficit condition are promising peanut genotypes.

show abstract

Moisture-deficit-induced changes in leaf-water content, leaf carbon exchange rate and biomass production in groundnut cultivars differing in specific leaf area

Cited by 137 publications

References 13 publications

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

Does Morphological and Anatomical Plasticity during the Vegetative Stage Make Wheat More Tolerant of Water Deficit Stress Than Rice?

Selection of intermittent drought tolerant lines across years and locations in the reference collection of groundnut (Arachis hypogaea L.)

Photosynthetic characteristics of peanut genotypes under excess and deficit irrigation during summer

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