Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet

Debieu, Maryline; Sine, Bassirou; Passot, Sixtine; Grondin, Alexandre; Akata, Eyanawa A.; Gangashetty, Prakash; Vadez, Vincent; Gantet, Pascal; Foncéka, Daniel; Cournac, Laurent; Hash, C. T.; Kane, Ndjido Ardo; Vigouroux, Yves; Laplaze, Laurent

doi:10.1371/journal.pone.0201635

Cited by 48 publications

(31 citation statements)

References 36 publications

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“…BoWax1 locus maps to chromosome CO1 [163]. The wax biosynthetic pathway genes identified in pearl millet were co-located to the QTL controlling biomass production under early drought stress and stay green traits [164]. Targeted breeding using the modern molecular breeding for this trait would be useful.…”

Section: Attempts By Crop Biologists To Manipulate Cuticle Traits 71mentioning

confidence: 99%

Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

Dhanyalakshmi¹,

Soolanayakanahally²,

Rahman³

et al. 2019

Abiotic and Biotic Stress in Plants

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Cuticular waxes form the primary interface between a plant and its external environment. The most important function of this hydrophobic interface is regulation of non-stomatal water loss, gas exchange and conferring resistance to a wide range of biotic as well as abiotic stresses. The biosynthesis, transport and deposition of the cuticular waxes are tightly coordinated by complex molecular networks, which are also often regulated in response to various developmental, biotic as well as abiotic cues. Evidences from model as well as non-model systems suggest that targeted manipulation of the molecular regulators of wax biosynthetic pathways could enhance plant resistance to multiple stresses as well as enhance the post-harvest quality of produce. Under the current scenario of varying climatic conditions, where plants often encounter multiple stress conditions, cuticular waxes is an appropriate trait to be considered for crop improvement programs, as any attempt to improve cuticular traits would be advantageous to the crop to enhance its adaptability to diverse adverse conditions. This chapter briefs on the significance of cuticular waxes in plants, its biosynthesis, transport and deposition, its implication on plant resistance to adverse conditions, and the current options in targeted manipulation of wax-traits for breeding new crop types.Abiotic and Biotic Stress in Plants 2 vegetative and reproductive growth. Some of the abiotic stresses such as drought, high temperature and salinity can influence the occurrence and spread of biotic agents like pathogens, insects, and weeds [1]. In crops like tomato, cucurbits and rice, temperature is one of the most important deciding factors for the occurrence of bacterial diseases [2]. Temperature can also alter the incidence of vector-borne diseases by modifying spread of vectors.But, in their natural environment, plants face combination of stresses, especially under the changing climate scenario. The effect of stresses would be more pronounced under combined (biotic and abiotic) stresses [3], while simultaneous occurrence of abiotic and biotic stresses are more destructive to crop production [4]. Hence, there exists a need now, to look for common traits that can contribute for plant adaptation to such multifarious stressful conditions and sustain crop productivity as well. In this scenario, it is desirable to have a single trait that can confer tolerance to multiple (abiotic and biotic) stresses. Cuticular waxes, a major component of plant cuticle covering all the aerial parts of the plants, can be considered as an important trait for combined stress resistance. Cuticular waxes: a component of plant cuticleThe cuticle is a unique structure developed by land plants during the course of their evolution from an aquatic to a terrestrial lifestyle [5]. The primary role of this lipophilic layer, comprising cutin and cuticular waxes, was to limit non-stomatal water loss by functioning as a physical barrier between the plant surface and its external environment [6]. Development of a...

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Section: Attempts By Crop Biologists To Manipulate Cuticle Traits 71mentioning

confidence: 99%

Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

Dhanyalakshmi¹,

Soolanayakanahally²,

Rahman³

et al. 2019

Abiotic and Biotic Stress in Plants

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“…Moreover, the research carried out so far has shown that there is a correlation between traits related to drought response and increased yield for wheat 48 . It has been also shown, that drought stress occurs during the seedling stage can influence grain production 49,50 and quality parameters 51 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of wheat gene expression related to the oxidative stress response and signal transduction under short-term osmotic stress

Dudziak

Zapalska

Börner

et al. 2019

Sci Rep

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Water shortage is a major environmental stress that causes the generation of reactive oxygen species (ROS). The increase in ROS production induces molecular responses, which are key factors in determining the level of plant tolerance to stresses, including drought. The aim of this study was to determine the expression levels of genes encoding MAPKs ( MAPK3 and MAPK6 ), antioxidant enzymes ( CAT , APX and GPX ) and enzymes involved in proline biosynthesis ( P5CS and P5CR ) in Triticum aestivum L. seedlings in response to short-term drought conditions. A series of wheat intervarietal substitution lines (ISCSLs) obtained by the substitution of single chromosomes from a drought-sensitive cultivar into the genetic background of a drought-tolerant cultivar was used. This source material allowed the chromosomal localization of the genetic elements involved in the response to the analyzed stress factor (drought). The results indicated that the initial plant response to drought stress resulted notably in changes in the expression of MAPK6 and CAT and both the P5CS and P5CR genes. Our results showed that the substitution of chromosomes 3B, 5A, 7B and 7D had the greatest impact on the expression level of all tested genes, which indicates that they contain genetic elements that have a significant function in controlling tolerance to water deficits in the wheat genome.

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“…Each experiment was performed in a different location in the station. Tillage and chemical fertilization were applied as recommended for pearl millet [17]. Weeding was performed before planting and one week before root measurements.…”

Section: Methodsmentioning

confidence: 99%

“…Weeding was performed before planting and one week before root measurements. Shoot Agro-morphological characters were measured at the end of the cycle as previously described [17].…”

Section: Methodsmentioning

confidence: 99%

Development of a model estimating root length density from root impacts on a soil profile in pearl millet (Pennisetum glaucum (L.) R. Br). Application to measure root system response to water stress in field conditions

Faye

Sine

Chopart³

et al. 2019

PLoS ONE

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Pearl millet is able to withstand dry and hot conditions and plays an important role for food security in arid and semi-arid areas of Africa and India. However, low soil fertility and drought constrain pearl millet yield. One target to address these constraints through agricultural practices or breeding is root system architecture. In this study, in order to easily phenotype the root system in field conditions, we developed a model to predict root length density (RLD) of pearl millet plants from root intersection densities (RID) counted on a trench profile in field conditions. We identified root orientation as an important parameter to improve the relationship between RID and RLD. Root orientation was notably found to depend on soil depth and to differ between thick roots (more anisotropic with depth) and fine roots (isotropic at all depths). We used our model to study pearl millet root system response to drought and showed that pearl millet reorients its root growth toward deeper soil layers that retain more water in these conditions. Overall, this model opens ways for the characterization of the impact of environmental factors and management practices on pearl millet root system development.

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Response to early drought stress and identification of QTLs controlling biomass production under drought in pearl millet

Cited by 48 publications

References 36 publications

Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

Leaf Cuticular Wax, a Trait for Multiple Stress Resistance in Crop Plants

Analysis of wheat gene expression related to the oxidative stress response and signal transduction under short-term osmotic stress

Development of a model estimating root length density from root impacts on a soil profile in pearl millet (Pennisetum glaucum (L.) R. Br). Application to measure root system response to water stress in field conditions

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