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Reynolds, M.P.; Singh, R. P.; Ibrahim, Amir M. H.; Ageeb, O.A.A.; Larqué-Saavedra, Alfonso; Quick, J. S.

doi:10.1023/a:1018355906553

Cited by 151 publications

(35 citation statements)

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“…Some researches (Grzesiak, 1990;Lorens et al, 1987aLorens et al, , 1987bMartiniello & Lorenzoni, 1985;Ristic & Cass, 1991) confirmed the existence in maize of a wide range of genotypic variability of response to drought. Plants develop different morphological, physiological and biochemical mechanisms which inhibit or remove the harmful effects of drought stresses (Boyer, 1982;Larsson & Go'rny, 1988;Chaves et al, 2002;Reynolds et al, 1998;Asharaf, 2010). Relatively little research was carried out on the response to drought stress of some plant species.…”

Section: Discussionmentioning

confidence: 99%

“…Differences in resistance to drought are known to exist within genotypes of plant species and were found in many studies, e.g. in maize (Martinielio & Lorenzoni, 1985;Lorens et al, 1987;Grzesiak, 1990;Grzesiak et al, 2012), wheat (Winter et al, 1988;Reynolds et al, 1998;Paknejad et al, 2007), rape seed (Richards & Thurling, 1978), oat (Larsson & Go'rny, 1988), coconut (Gomez et al, 2008) and triticale (Royo et al, 2000;Grzesiak et al, 2012). Unusual dry weather conditions adversely affect germination and seedling growth rates thus enhancing cell elongation sensitivity to damages induced under stressed conditions (Taylor et al, 1982;Delachiave & Pinho, 2003;Hamayun et al, 2010a).…”

Section: Introductionmentioning

confidence: 98%

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Effects of Drought Stress on Seed Germination and Seedling Growth of Different Maize Varieties

Liu¹,

Li²,

Liu³

et al. 2015

JAS

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Maize is susceptible to drought stress, especially during germination. The experiment of seed germination and seedling growth of two maize varieties under different concentration of mannitol solution was carried out. Four mannitol concentrations were set: 0, 200, 400 and 600 mM, and the corresponding solution osmotic potential was: 0, -0.49, -0.99, and -1.49 Mpa. Results indicated that Zhengdan958 germinated more quickly and in greater numbers than Liansheng15. The germination rate, germination potential, shoot and root fresh weight, shoot and root length of two maize varieties both decreased under drought stress, but they decreased more in Liansheng15 than in Zhengdan958. However, the germination and vigor index of Zhengdan958 were obviously higher than that of Liansheng15 under the stress of 200, 400 and 600 mM mannitol. These results showed that the drought resistances of Zhengdan958 was higher than that of Liansheng15 by having more powerful root system and higher osmotic adjustment ability.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Effects of Drought Stress on Seed Germination and Seedling Growth of Different Maize Varieties

Liu¹,

Li²,

Liu³

et al. 2015

JAS

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“…To reduce the error of variation due to this, the TDs were moderated following recommendations in previous studies (Keener and Kircher 1983;Reynolds et al 1994Reynolds et al , 1998Wilman et al 1992;Scott and Knott 1974). First, the minimum and the maximum ambient air temperatures were noted for each sampling day during the 12:00-14:00 sampling window.…”

Section: Statistical Transformation For Qtl Analysismentioning

confidence: 99%

QTL mapping and loci dissection for leaf epicuticular wax load and canopy temperature depression and their association with QTL for staygreen in Sorghum bicolor under stress

et al. 2017

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Plant waxes and staygreen are distinct phenotypic traits that have been independently implicated in heat and drought tolerance among grasses. The association between these two traits has not been fully explored, which makes the exploitation of synergy between them difficult. This study assessed the association between QTL regulating the staygreen (Stg) trait in sorghum and those regulating epicuticular wax load (WL) and associated canopy temperature depression (TD). Using a recombinant inbred line (RIL) population derived from Tx642 and Tx7000, phenotypic data were collected in three replicated field trials and one greenhouse trial. High absolute TD generally corresponded to high WL. The r 2 of TD against WL was highest under non-stress conditions in the greenhouse while it was much larger in the cooler and irrigated field conditions compared to hotter, drier field trials. The genetic correlations between the two traits also followed this pattern. Composite interval mapping identified a total of 28 QTL, 15 of which had significant overlaps between different traits. Most of the wax QTL were associated with pre-anthesis drought tolerant Tx7000. However, one QTL for WL overlapped with a QTL for staygreen (Stg2) and was represented by a single, isolated marker near the centromeric region on the short arm of SBI-01. The marker is identified by a Cis-acting regulatory module and is part of a 2-kb multifunctional motif-rich region which includes core promoter and enhancer regions and transcription elements, including a droughtresponsive MYB binding site. We suggest that this QTL may be pleiotropic for important stress tolerance mechanisms regulating both staygreen and leaf wax in sorghum.

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“…This indicates that elongation rates of the seminal roots and, presumably, the depth of rooting was improved as the root system of wheat was enlarged by genetically increasing leaf vigour. Canopy temperature measured by infrared thermometry is a method for estimating crop water and heat stress in wheat (Blum et al 1989;Reynolds et al 1998). Under conditions of droughtstress, wheat genotypes with lower midday canopy temperatures had a better plant water status (Blum et al 1989).…”

Section: Improving the Elongation Rate Of Seminal Rootsmentioning

confidence: 99%

Large root systems: are they useful in adapting wheat to dry environments?

Palta

Chen

Milroy

et al. 2011

Functional Plant Biol.

256

187

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Abstract. There is little consensus on whether having a large root system is the best strategy in adapting wheat (Triticum aestivum L.) to water-limited environments. We explore the reasons for the lack of consensus and aim to answer the question of whether a large root system is useful in adapting wheat to dry environments. We used unpublished data from glasshouse and field experiments examining the relationship between root system size and their functional implication for water capture. Individual root traits for water uptake do not describe a root system as being large or small. However, the recent invigoration of the root system in wheat by indirect selection for increased leaf vigour has enlarged the root system through increases in root biomass and length and root length density. This large root system contributes to increasing the capture of water and nitrogen early in the season, and facilitates the capture of additional water for grain filling. The usefulness of a vigorous root system in increasing wheat yields under water-limited conditions maybe greater in environments where crops rely largely on seasonal rainfall, such as the Mediterranean-type environments. In environments where crops are reliant on stored soil water, a vigorous root system increases the risk of depleting soil water before completion of grain filling.Additional keywords: root biomass, root length, root length density, root system size, water capture.

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Cited by 151 publications

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Effects of Drought Stress on Seed Germination and Seedling Growth of Different Maize Varieties

Effects of Drought Stress on Seed Germination and Seedling Growth of Different Maize Varieties

QTL mapping and loci dissection for leaf epicuticular wax load and canopy temperature depression and their association with QTL for staygreen in Sorghum bicolor under stress

Large root systems: are they useful in adapting wheat to dry environments?

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