Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

Taleb, Mohammad Hadi; Majidi, Mohammad Mahdi; Maibody, S. A. M. Mirmohammady; Pirnajmedin, Fatemeh

doi:10.1111/pbr.12936

Cited by 4 publications

(1 citation statement)

References 59 publications

(73 reference statements)

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“…The positive relationship between STS and RR under drought stress conditions showed that selection based on higher STS may lead to genotypes with higher RR and drought tolerance. Similar to our findings, positive relationships have been reported between recovery rate and drought tolerance index in tall fescue under drought stress conditions 45 . Yield stability and the high recovery rate after long drought can be important goals in the breeding programs in perennial grasses under drought stress environments 11 .…”

Section: Discussionsupporting

confidence: 92%

Plant functional trait responses to cope with drought in seven cool-season grasses

Taleb

Majidi

Pirnajmedin

et al. 2023

Sci Rep

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In semi-arid and arid regions, the selection of suitable grass species with high-yield production, tolerance to drought stress, and potential for recovery from drought is of special importance. Despite extensive research in cool-season grasses, inter-species differences in post-drought recovery, persistence, survival, and summer dormancy and their relationship with drought tolerance need more investigation. In the present study, 28 diverse genotypes belonged to seven cool-season grass species, including Festuca arundinacea (tall fescue), Festuca pratensis (meadow fescue), Festuca ovina (sheep fescue), Festuca rubra (red fescue), Lolium perenne (perennial ryegrass), Lolium multiflorum (Italian ryegrass) and Lolium × hybridum were evaluated during 2016–2019 under three irrigation regimes (normal, mild, and intense drought stress). Then in the fourth year (on August 2019), irrigation was withheld at all previous irrigation regimes for two months during summer, and then species were re-irrigated to study the effect of prolonged drought conditions. A wide range of genetic diversity was detected in all the measured traits among and within species in response to different irrigation levels. Recurrent drought stress decreased forage productivity, post-drought recovery, and survival in all grass species. Among the studied species, tall fescue had higher forage production, drought tolerance, survival, recovery rate, and persistence. Sheep fescue had low forage production and recovery after drought. Drought tolerance (based on stress tolerance score, STS) was highly associated with forage yield and post-drought recovery and partially with summer dormancy under both mild and intense drought stress conditions. This indicated that selection based on higher STS would lead to choosing genotypes with better recovery after prolonged drought. Superior species and preferable genotypes for forage use from species Festuca arundinacea and for turf application from species Festuca arundinacea, Lolium perenne and Lolium × hybridum were identified across different water environments for future programs.

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Section: Discussionsupporting

confidence: 92%

Plant functional trait responses to cope with drought in seven cool-season grasses

Taleb

Majidi

Pirnajmedin

et al. 2023

Sci Rep

Self Cite

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H2O2 leaf priming improves tolerance to cold stress in pistachio rootstocks

Jamshidi Goharrizi,

Momeni,

Karami

et al. 2024

Acta Physiol Plant

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Differences of morphological and physiological responses of sainfoin varieties/lines under simulated drought stresses

Yao,

Wang,

Nan

2024

Grassland Science

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Sainfoin (Onobrychis viciaefolia) is an important legume forage. This study aims to explore the response mechanisms of sainfoin germplasm resource accessions to drought stress, which provides the theoretical basis for tolerant breeding of sainfoin. In this study, 20 sainfoin germplasm resource accessions were used as the test materials, and the effects of drought stress on morphological and physiological characteristics were determined under simulated levels of drought (−0.5, −1.0, −1.5 and −2.0 MPa) × exposure times (7 days) in pots. The results showed that leaf area, leaf relative water content, root‐shoot ratio, root length, root surface area, root volume, root diameter, root tip number, chlorophyll a content, chlorophyll b content and catalase activity decreased with increasing drought stress. In contrast, proline, soluble sugar, soluble protein and malondialdehyde contents increased in response to drought. Root activity, superoxide dismutase and peroxidase activities increased first and then decreased and reached the maximum at −1.0 MPa. Cluster analysis showed that 20 sainfoin germplasm resources could be divided into three categories, of which four accessions were high tolerance types, and three accessions were low tolerance type. These findings will help provide some theoretical basis for cultivating new varieties.

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Variation in persistency, postdrought recovery and root characteristics in a tall fescue germplasm under interactive effects of exogenously applied salicylic acid and water stress

Cited by 4 publications

References 59 publications

Plant functional trait responses to cope with drought in seven cool-season grasses

Plant functional trait responses to cope with drought in seven cool-season grasses

H2O2 leaf priming improves tolerance to cold stress in pistachio rootstocks

Differences of morphological and physiological responses of sainfoin varieties/lines under simulated drought stresses

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