Biomass partitioning, morphology and water status of four alfalfa genotypes submitted to progressive drought and subsequent recovery

Erice, Gorka; Louahlia, Saïd; Irigoyen, Juan José; Sánchez‐Díaz, Manuel; Avice, Jean‐Christophe

doi:10.1016/j.jplph.2009.07.016

Cited by 133 publications

(102 citation statements)

References 34 publications

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“…Results showed that leaves, shoots and roots dry matters were reduced significantly mainly under severe stress levels (25% and 50% of field capacity). These results are similar to those obtained by Mauriè s (1994) and Erice et al (2010) indicating that water stress caused a significant reduction of the quantity of dry matter in the aboveground and below ground organs in alfalfa plants. These finding are the same also for many species such as pearl millet (Pennise tumglaucum L.) (Kusaka et al 2005), Phaseolus vulgaris (Ashraf & Iram 2005) and maize (Chimenti et al 2006).…”

Section: Discussionsupporting

confidence: 91%

Alfalfa nutritive quality as influenced by drought in South-Eastern Oasis of Tunisia

Abid

Mansour

Yahia

et al. 2016

Italian Journal of Animal Science

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Medicago sativa is the main perennial legume in many places in the world such as South-East Tunisian Oases. The widespread use of this species is due to its high adaptability, forage yield potential and to its good quality. Furthermore, the succession of drought years in South-East Tunisian Oases especially in Gabes influenced fodder distribution and digestibility. To a better understanding of the variation of the nutritive value of (Medicago sativa L.) plants, the effect of four drought levels (25%; 50%; 75% and 100% of field capacity) on nutritive quality was investigated for three populations [P1 (Gannouch); P2 (Chenini) and P3 (Tebelbou)] cultivated in these oases. Results showed that drought reduced leaves, shoots and roots dry matter, while this effect was more pronounced for above organs (values reached 1.2 mg) than below organs (values reached 1.8 mg). However, drought decreased phosphor, calcium, magnesium and nitrogen contents, neutral detergent fibre, acid detergent fibre and in acid detergent lignin content for P1 and P2, this stress enhanced potassium uptake, leaves shoots and roots shoots ratios especially for P3, values passed from 1.56 for control treatment to 2.06 for 25% of field capacity. This population seems to be the most resistant to drought by maintaining reduced leaf area and elevated ratios. This result indicates that Medicago sativa succeed to maintain a good nutritive value under stress conditions. To the best of our knowledge, it is important to study the effect of this stress on others varieties to more understand its effect on nutritive value. ARTICLE HISTORY

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Section: Discussionsupporting

confidence: 91%

Alfalfa nutritive quality as influenced by drought in South-Eastern Oasis of Tunisia

Abid

Mansour

Yahia

et al. 2016

Italian Journal of Animal Science

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“…3). In addition, a decrease in the SLA (Table 3) was observed with respect to the control, indicating that leaves became smaller and thicker, in order to be more efficient for controlling water losses under water stress conditions [13]. Large decreases in shoot DM compared with root DM were observed under water stress, in accordance with Blum [45] and Munns and Tester [6].…”

Section: Water Stress Effectssupporting

confidence: 62%

Salinity and Water Stress Effects on Biomass Production in Different Arundo donax L. Clones

et al. 2015

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Perennial rhizomatous grasses are regarded as leading energy crops due to their environmental benefits and their suitability to regions with adverse conditions. In this paper, two different experiments were carried out in order to study the salinity (S) and water stress (WS) effects on biomass production in giant reed (Arundo donax L.). In Experiment 1, eight clones of giant reed were subjected to four S and WS treatments: (i) well-watered with nonsaline solution, (ii) water stress with non-saline solution, (iii) well-watered with saline solution and iv) water stress with saline solution. In Experiment 2, five clones of giant reed were subjected to increasing S levels in two locations: University of Catania (UNICT-Italy) (i)well-watered with non-saline solution and (ii)wellwatered with mild saline solution; and University of Barcelona (UB-Spain) (iii)well-watered with non-saline solution and (iv)well-watered with severe saline solution. Photosynthetic and physiological parameters as well as biomass production were measured in these plants. According to our data, giant reed seems to be more tolerant to S than WS. Both stresses mainly affected stomatal closure to prevent dehydration of the plant, and eventually decreasing the photosynthetic rate. The differential performance of the giant reed clones was ranked according to their tolerance to S and WS by using the Stress Susceptibility Index. 'Agrigento' was the most WS resistant clone and 'Martinensis' was the most S resistant. 'Martinensis' and 'Piccoplant' were found to be the most suitable clones for growing under both stress conditions. Moreover, 'Fondachello', 'Cefalú' and 'Licata' were the most resistant clones to increasing S levels.Keywords: Arundo donax L.; biomass; water stress; salinity stress; photosynthesis; Stress Susceptibility Index. ABBREVIATIONSA sat , light saturated net CO 2 assimilation rate (µmol m -2 s -1 ); DLP, complete dry leaves percentage (%); DM, dry matter (g); FC, field capacity; g s , stomatal conductance (mol m -2 s -1 ); gLA, green leaf area (m 2 ); GLP, complete green leaves percentage (%); H, height (cm); LAR, leaf area ratio (m 2 Kg -1 ); LWR, leaf weight ratio (Kg Kg -1 ); NL, number of leaves; NS, number of stems; PPFD, photosynthetic photon flux density; PRG, perennial rhizomatous grasses; RWC, relative water content (%); S, salinity; SA, stem area (m 2 ); SLA, specific leaf area (m 2 Kg -1 ); S/R, shoot/root ratio (g g -1 ); SSI, stress susceptibility index; TDW, total dry weight (g); WS, water stress; YLP, complete yellow leaves percentage (%).3

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“…One of the mechanisms associated with drought tolerance is the ability of a plant to retain cellular water under water deficit stress (Kumar et al 2004;Erice et al 2010). RWC is a physiological measurement of plant cellular water status influenced by both leaf water potential and osmotic adjustment (Barrs and Weatherley 1962).…”

Section: Resultsmentioning

confidence: 99%

“…Leaf RWC is a reliable indicator of leaf water deficit status at the time of sampling. It is often used to examine the response of a plant to the progress of drought stress (Lafitte and Courtois 2002;Erice et al 2010). To determine the water status changes within plants after initiating drought stress, we measured leaf RWC of maize inbred lines at 4 days, 7 days, and 10 days of drought treatment in the MD, SD, and PD plots and compared these values with RWC of leaf tissue measured prior to treatment (0 days).…”

Section: Resultsmentioning

confidence: 99%

Characterization of maize inbred lines for drought and heat tolerance

Chen¹,

Xu²,

Velten³

et al. 2012

Journal of Soil and Water Conservation

141

117

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Drought and high temperature are two major environmental factors that severely limit plant productivity in the United States and worldwide, often causing extensive economic loss to agriculture. As global climate change progresses, agricultural production worldwide faces serious threats from frequent extreme weather conditions. Integrated approaches that improve the efficiency of agricultural water use and development of plant varieties that can alleviate the negative impacts of environmental stresses to maintain yield stability are essential to sustain and increase agriculture production. Maize (Zea mays L.) is a major crop in the United States and worldwide. Its production and yield stability are greatly affected by drought and high temperature stresses. Improving drought and heat tolerance in maize has become one of the top priorities for maize breeding programs in both private and public sectors. Identification of maize germplasm with superior drought and/or heat tolerance is essential and prerequisite for such propose. In this report, we evaluated a selection of maize inbred lines for drought and heat stress tolerance under field conditions in 2009 and 2010 and identified several inbred lines that showed high tolerance to drought. Tolerant inbred lines (Tx205, C2A554-4, and B76) were able to maintain relatively high leaf relative water content when subjected to drought stress, while sensitive lines (B73 and C273A) showed a rapid reduction in leaf relative water content at very early stage of drought. The tolerant lines also showed significantly greater ability to maintain vegetative growth and alleviate damage to reproductive tissues under drought conditions compared to the sensitive lines. Maize inbred lines and hybrids were also evaluated for tolerance to high temperature under well-watered conditions through field observations following the occurrence of major heat events. Maize inbred lines of distinct heat tolerance phenotype were identified. Furthermore, genetic and phenotypic analysis showed that maize hybrids made from inbred lines with superior heat tolerance inherited an enhanced tolerance to elevated temperatures. The tolerant germplasm accessions, like those identified in this study, are essential materials for breeding drought-and/ or heat-tolerant maize hybrids. Study for the potential use of such materials to produce maize hybrids that are able to alleviate the negative impacts of drought and heat stress on the growth and development of maize plants is underway.Key words: climate change-crop production-drought-germplasm-high temperature-maize Water and temperature are two critical environmental factors that continually influence the growth and development of plants. Drought and temperature extremes can cause extensive economic loss to agriculture (Boyer 1982;Peng et al. 2004; NCDC 2011), an effect that is likely to increase as global climate change progresses (Stern 2006;Keane et al. 2009). The 2011 drought and heat waves (heat stress) have caused more than US$5 billion in direct lo...

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Biomass partitioning, morphology and water status of four alfalfa genotypes submitted to progressive drought and subsequent recovery

Cited by 133 publications

References 34 publications

Alfalfa nutritive quality as influenced by drought in South-Eastern Oasis of Tunisia

Alfalfa nutritive quality as influenced by drought in South-Eastern Oasis of Tunisia

Salinity and Water Stress Effects on Biomass Production in Different Arundo donax L. Clones

Characterization of maize inbred lines for drought and heat tolerance

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