Variability of root traits in sesame genotypes under different irrigation regimes

Hamedani, Nima Ghasemi; Gholamhoseini, Majid; Bazrafshan, Foroud; Amiri, Bahram; Habibzadeh, Farhad

doi:10.1016/j.rhisph.2020.100190

Cited by 11 publications

(6 citation statements)

References 30 publications

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“…Furthermore, from a genetic point of view, the root:shoot ratio also showed genotypic variation in bottle gourd in response to a water deficit. A significant genotypic variation in the root:shoot ratio in response to a water deficit has also been reported in other crop species (i.e., rice—Cui et al, 2008 ; sesame—Hamedani et al, 2020 ; chickpea—Ramamoorthy et al, 2017 ). These findings suggest that a higher root:shoot ratio in response to drought stress is an advantage that enables plants to cope with water-limited conditions, depending on the genotype, the degree, and duration of drought stress, or the synergistic/antagonistic interaction of these factors (Xu et al, 2015 ).…”

Section: Discussionmentioning

confidence: 59%

“…There is evidence that in different crops under water-deficit conditions, the drought-resistant genotypes showed higher fine root length than the susceptible genotype (i.e., soybean—Chun et al, 2021 ; wheat—Henry et al, 2012 ; lentil—Gorim and Vandenberg, 2017 ). Moreover, a genotype with a higher total root length in the middle or deeper layers of the soil may be resistant to drought due to an efficient distribution of roots (Hamedani et al, 2020 ). In this context, our results may indicate that L. siceraria genotypes use different mechanisms of adaptation to tolerate water deficits.…”

Section: Discussionmentioning

confidence: 99%

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Variation in Root-Related Traits Is Associated With Water Uptake in Lagenaria siceraria Genotypes Under Water-Deficit Conditions

et al. 2022

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In many agricultural areas, crop production has decreased due to a lack of water availability, which is having a negative impact on sustainability and putting food security at risk. In plants, the plasticity of the root system architecture (RSA) is considered to be a key trait driving the modification of the growth and structure of roots in response to water deficits. The purpose of this study was to examine the plasticity of the RSA traits (mean root diameter, MRD; root volume, RV; root length, RL; and root surface area, SA) associated with drought tolerance in eight Lagenaria siceraria (Mol. Standl) genotypes, representing three different geographical origins: South Africa (BG-58, BG-78, and GC), Asia (Philippines and South Korea), and Chile (Illapel, Chepica, and Osorno). The RSA changes were evaluated at four substrate depths (from 0 to 40 cm). Bottle gourd genotypes were grown in 20 L capacity pots under two contrasting levels of irrigation (well-watered and water-deficit conditions). The results showed that the water productivity (WP) had a significant effect on plasticity values, with the Chilean accessions having the highest values. Furthermore, Illapel and Chepica genotypes presented the highest WP, MRD, and RV values under water-deficit conditions, in which MRD and RV were significant in the deeper layers (20–30 and 30–40 cm). Biplot analysis showed that the Illapel and Chepica genotypes presented a high WP, MRD, and RV, which confirmed that these may be promising drought-tolerant genotypes. Consequently, increased root diameter and volume in bottle gourd may constitute a response to a water deficit. The RSA traits studied here can be used as selection criteria in bottle gourd breeding programs under water-deficit conditions.

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Section: Discussionmentioning

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Variation in Root-Related Traits Is Associated With Water Uptake in Lagenaria siceraria Genotypes Under Water-Deficit Conditions

et al. 2022

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“…A larger root system alone may not contribute much to drought tolerance if the large root portion is not distributed into moist soil (Jongrungklang et al, 2011). A number of studies have documented the distribution of RLD in response drought in wheat (Zuo et al, 2006;Steinemann et al, 2015;Ali et al, 2018), barley (Ahmadi et al, 2020), chickpea (Purushothaman et al, 2017), sesame (Hamedani et al, 2020), maize (Zhan et al, 2015;Gao and Lynch, 2016;Jia et al, 2018), and melon (Sharma et al, 2018). These studies revealed different strategies in response to drought and in many cases RLD in the topsoil was more negatively affected by water stress (Figure 6).…”

Section: Responses Of 1d/2d Root Length Density Distribution and 3d R...mentioning

confidence: 99%

“…Under water-stressed condition, RLD ws =0.83×e -3.14×D (n=154, R 2 = 0.47, P<0.001). Original data are obtained from Figure 4 in Zhan et al (2015), Figure 5 in Gao and Lynch (2016), Figure 5 in Fitters et al (2017), Figure 2 in Ahmadi et al (2018), Figure 7 in Faye et al (2019), and Figure 5 in Hamedani et al (2020).…”

Section: Responses Of 1d/2d Root Length Density Distribution and 3d R...mentioning

confidence: 99%

Responses of root system architecture to water stress at multiple levels: A meta-analysis of trials under controlled conditions

2022

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Plants are exposed to increasingly severe drought events and roots play vital roles in maintaining plant survival, growth, and reproduction. A large body of literature has investigated the adaptive responses of root traits in various plants to water stress and these studies have been reviewed in certain groups of plant species at a certain scale. Nevertheless, these responses have not been synthesized at multiple levels. This paper screened over 2000 literatures for studies of typical root traits including root growth angle, root depth, root length, root diameter, root dry weight, root-to-shoot ratio, root hair length and density and integrates their drought responses at genetic and morphological scales. The genes, quantitative trait loci (QTLs) and hormones that are involved in the regulation of drought response of the root traits were summarized. We then statistically analyzed the drought responses of root traits and discussed the underlying mechanisms. Moreover, we highlighted the drought response of 1-D and 2-D root length density (RLD) distribution in the soil profile. This paper will provide a framework for an integrated understanding of root adaptive responses to water deficit at multiple scales and such insights may provide a basis for selection and breeding of drought tolerant crop lines.

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“…Beyond its economic significance, sesame cultivation contributes to sustainable agriculture by improving soil fertility and mitigating the detrimental effects of soil degradation [3]. While sesame plays a vital role in various agroecosystems, it faces challenges and limitations, particularly in regions characterised by environmental stressors such as drought, salinity, and heat [4]. These detrimental factors hinder the development of sesame cultivation.…”

Section: Introductionmentioning

confidence: 99%

Sesame Germination Dynamics: Unravelling Sesame’s Response to Salinity and Temperature Variability

Gholamhoseini,

Dolatabadian

2024

Seeds

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Sesame (Sesamum indicum), a highly valued oilseed, faces challenges in cultivation, especially in regions susceptible to environmental stressors. This study investigates the interactive effects of salinity and temperature on sesame seed germination. Two cultivars, Darab 1 and Oltan, were subjected to various salinity levels (−3 to −12 bars) and temperatures (15 °C, 20 °C, and 25 °C). Results revealed that at 15 °C, salinity levels beyond -3 bars significantly reduced germination, while at 25 °C, 40% and 62% germination rates were recorded even at −12 bars for Darab 1 and Oltan, respectively. This study highlights the importance of temperature in mitigating the inhibitory effects of salinity on germination. Germination speed exhibited a decline with increasing salinity, particularly at lower temperatures. Shoot and root lengths and dry weights decreased with rising salinity, but Oltan demonstrated greater tolerance than Darab 1. The research emphasises the species-specific nature of temperature-salinity interactions and the intraspecific variability among sesame cultivars. Notably, Oltan, adapted to arid regions with elevated temperatures, displayed increased tolerance to salinity stress. These findings contribute to understanding sesame’s resilience to environmental stressors, aiding in developing resilient cultivars for challenging agricultural landscapes. Overall, temperature is pivotal in influencing sesame seed germination and early seedling growth under salinity stress, offering insights for optimised cultivation practices.

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Variability of root traits in sesame genotypes under different irrigation regimes

Cited by 11 publications

References 30 publications

Variation in Root-Related Traits Is Associated With Water Uptake in Lagenaria siceraria Genotypes Under Water-Deficit Conditions

Variation in Root-Related Traits Is Associated With Water Uptake in Lagenaria siceraria Genotypes Under Water-Deficit Conditions

Responses of root system architecture to water stress at multiple levels: A meta-analysis of trials under controlled conditions

Sesame Germination Dynamics: Unravelling Sesame’s Response to Salinity and Temperature Variability

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