Genetic improvement combined with seed ethephon priming improved grain yield and drought resistance of wheat exposed to soil water deficit at tillering stage

Yang, Hongnan; Hu, Wenmei; Zhao, Jiarong; Huang, Xiulan; Zheng, Ting; Fan, Guoquan

doi:10.1007/s10725-021-00749-x

Cited by 19 publications

(12 citation statements)

References 85 publications

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“…It is predicted that global warming will increase by 1.5°C in the next decade and annual precipitation will decrease by 4–27% in different parts of the world (IPCC, 2021). Drought and heat cause up to 86% and 69% yield losses in wheat, respectively ( Prasad et al., 2011 ; Yang et al., 2021 ). Drought is the inadequacy of water availability including precipitation and soil moisture storage during the crop growth period both in duration and quantity which restrict the genetic yield potential ( Sinha, 1986 ).…”

Section: Introductionmentioning

confidence: 99%

Marker assisted improvement for leaf rust and moisture deficit stress tolerance in wheat variety HD3086

Sunilkumar

Krishna²,

Devate³

et al. 2022

Front. Plant Sci.

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There is a significant yield reduction in the wheat crop as a result of different biotic and abiotic stresses, and changing climate, among them moisture deficit stress and leaf rust are the major ones affecting wheat worldwide. HD3086 is a high-yielding wheat variety that has been released for commercial cultivation under timely sown irrigated conditions in the Indo-Gangetic plains of India. Variety HD3086 provides a good, stable yield, and it is the choice of millions of farmers in India. It becomes susceptible to the most prevalent pathotypes 77-5 and 77-9 of Puccinia triticina (causing leaf rust) in the production environment and its potential yield cannot be realized under moisture deficit stress. The present study demonstrates the use of a marker-assisted back cross breeding approach to the successful transfer of leaf rust resistance gene Lr24 and QTLs linked to moisture deficit stress tolerance in the background of HD3086. The genotype HI1500 was used as a donor parent that possesses leaf rust-resistant gene Lr24, which confers resistance against the major pathotypes found in the production environment. It possesses inbuilt tolerance under abiotic stresses with superior quality traits. Foreground selection for gene Lr24 and moisture deficit stress tolerance QTLs linked to Canopy temperature (CT), Normal Differential Vegetation Index (NDVI) and Thousand Kernel Weight (TKW) in different generations of the backcrossing and selection. In BC2F2, foreground selection was carried out to identify homozygous lines based on the linked markers and were advanced following pedigree based phenotypic selection. The selected lines were evaluated against P. triticina pathotypes 77-5 and 77-9 under controlled conditions. Recurrent parent recovery of the selected lines ranged from 78-94%. The identified lines were evaluated for their tolerance to moisture stress under field conditions and their resistance to rust under artificial epiphytotic conditions for two years. In BC2F5 generation, eight positive lines for marker alleles were selected which showed resistance to leaf rust and recorded an improvement in component traits of moisture deficit stress tolerance such as CT, NDVI, TKW and yield compared to the recurrent parent HD3086. The derived line is named HD3471 and is nominated for national trials for testing and further release for commercial cultivation.

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Section: Introductionmentioning

confidence: 99%

Marker assisted improvement for leaf rust and moisture deficit stress tolerance in wheat variety HD3086

Sunilkumar

Krishna²,

Devate³

et al. 2022

Front. Plant Sci.

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“…Primed rice seedlings displayed increased POX and SOD activity to dissuade the harmful effects caused by oxidative damage in response to subsequent drought stress (Li et al 2011 ). According to Yang et al, ( 2021 ), when compared with unprimed control, the primed plants showed lower CAT activity, whereas increasing the activity of SOD fivefold. In Nicotiana tabacum L. , POD activity was linked to reduced H 2 O 2 levels in primed plants under drought treatment (Khan et al 2020 ).…”

Section: Gene Expression Regulation Link To Physiological Biochemical...mentioning

confidence: 94%

Stress memory and its regulation in plants experiencing recurrent drought conditions

et al. 2023

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Developing stress-tolerant plants continues to be the goal of breeders due to their realized yields and stability. Plant responses to drought have been studied in many different plant species, but the occurrence of stress memory as well as the potential mechanisms for memory regulation is not yet well described. It has been observed that plants hold on to past events in a way that adjusts their response to new challenges without altering their genetic constitution. This ability could enable training of plants to face future challenges that increase in frequency and intensity. A better understanding of stress memory-associated mechanisms leading to alteration in gene expression and how they link to physiological, biochemical, metabolomic and morphological changes would initiate diverse opportunities to breed stress-tolerant genotypes through molecular breeding or biotechnological approaches. In this perspective, this review discusses different stress memory types and gives an overall view using general examples. Further, focusing on drought stress, we demonstrate coordinated changes in epigenetic and molecular gene expression control mechanisms, the associated transcription memory responses at the genome level and integrated biochemical and physiological responses at cellular level following recurrent drought stress exposures. Indeed, coordinated epigenetic and molecular alterations of expression of specific gene networks link to biochemical and physiological responses that facilitate acclimation and survival of an individual plant during repeated stress.

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“…In a study by Zhang et al (2021), an ethephon (a liquid formulation that releases ethylene gas after spraying) pre‐treatment was administered to Kentucky bluegrass ( Poa pratensis L.), which subsequently led to an osmotic enhancement when exposed to drought stress by promoting antioxidant enzyme activity and the accumulation of proline. Similarly, priming wheat grains with ethylene has been shown to elicit improved drought tolerance by regulating auxin and abscisic acid signaling, ROS scavenging, and osmotic regulation (Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Effect of ethylene pretreatment on tomato plant responses to salt, drought, and waterlogging stress

Mohorović,

Geldhof,

Holsteens

et al. 2023

Plant Direct

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Salinity, drought, and waterlogging are common environmental stresses that negatively impact plant growth, development, and productivity. One of the responses to abiotic stresses is the production of the phytohormone ethylene, which induces different coping mechanisms that help plants resist or tolerate stress. In this study, we investigated if an ethylene pretreatment can aid plants in activating stress‐coping responses prior to the onset of salt, drought, and waterlogging stress. Therefore, we measured real‐time transpiration and CO2 assimilation rates and the impact on biomass during and after 3 days of abiotic stress. Our results showed that an ethylene pretreatment of 1 ppm for 4 h did not significantly influence the negative effects of waterlogging stress, while plants were more sensitive to salt stress as reflected by enhanced water losses due to a higher transpiration rate. However, when exposed to drought stress, an ethylene pretreatment resulted in reduced transpiration rates, reducing water loss during drought stress. Overall, our findings indicate that pretreating tomato plants with ethylene can potentially regulate their responses during the forthcoming stress period, but optimization of the ethylene pre‐treatment duration, timing, and dose is needed. Furthermore, it remains tested if the effect is related to the stress duration and severity and whether an ethylene pretreatment has a net positive or negative effect on plant vigor during stress recovery. Further investigations are needed to elucidate the mode of action of how ethylene priming impacts subsequent stress responses.

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Genetic improvement combined with seed ethephon priming improved grain yield and drought resistance of wheat exposed to soil water deficit at tillering stage

Cited by 19 publications

References 85 publications

Marker assisted improvement for leaf rust and moisture deficit stress tolerance in wheat variety HD3086

Marker assisted improvement for leaf rust and moisture deficit stress tolerance in wheat variety HD3086

Stress memory and its regulation in plants experiencing recurrent drought conditions

Effect of ethylene pretreatment on tomato plant responses to salt, drought, and waterlogging stress

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