Effects of endophytic fungi on some drought tolerance mechanisms of tall fescue in a hydroponics culture

Bayat, Fereshteh; Mirlohi, Aghafakhr; Khodambashi, M.

doi:10.1134/s1021443709040104

Cited by 70 publications

(37 citation statements)

References 26 publications

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“…Similar results were reported in endophyte-infected Lolium perenne [36]. On the other hand, the greater proline concentration in roots of E- RAB plants compared to E+ plants at the lowest water availability and the larger amount of dead leaves suggests that E+ plants were less stressed, which agrees with results reported for endophytic tall fescue shoots [17,23]. Proline metabolism may be affected in E+ plants because this amino acid is a product of ergot alkaloid breakdown and peramine synthesis, both produced by the endophyte [16,78].…”

Section: Discussionsupporting

confidence: 88%

Fungal Endophyte (Epichloë festucae) Alters the Nutrient Content of Festuca rubra Regardless of Water Availability

et al. 2013

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Festuca rubra plants maintain associations with the vertically transmitted fungal endophyte Epichloë festucae. A high prevalence of infected host plants in semiarid grasslands suggests that this association could be mutualistic. We investigated if the Epichloë-endophyte affects the growth and nutrient content of F. rubra plants subjected to drought. Endophyte-infected (E+) and non-infected (E−) plants of two half-sib lines (PEN and RAB) were subjected to three water availability treatments. Shoot and root biomass, nutrient content, proline, phenolic compounds and fungal alkaloids were measured after the treatments. The effect of the endophyte on shoot and root biomass and dead leaves depended on the plant line. In the PEN line, E+ plants had a greater S:R ratio than E-, but the opposite occurred in RAB. In both plant lines and all water treatments, endophyte-infected plants had greater concentrations of N, P and Zn in shoots and Ca, Mg and Zn in roots than E- plants. On average, E+ plants contained in their shoots more P (62%), Zn (58%) and N (19%) than E- plants. While the proline in shoots increased in response to water stress, the endophyte did not affect this response. A multivariate analysis showed that endophyte status and plant line impose stronger differences in the performance of the plants than the water stress treatments. Furthermore, differences between PEN and RAB lines seemed to be greater in E- than in E+ plants, suggesting that E+ plants of both lines are more similar than those of their non-infected version. This is probably due to the endophyte producing a similar effect in both plant lines, such as the increase in N, P and Zn in shoots. The remarkable effect of the endophyte in the nutrient balance of the plants could help to explain the high prevalence of infected plants in natural grasslands.

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Section: Discussionsupporting

confidence: 88%

Fungal Endophyte (Epichloë festucae) Alters the Nutrient Content of Festuca rubra Regardless of Water Availability

et al. 2013

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“…The relatively lower accumulation of proline in endophytic plants could, therefore, be an indication that there is less damage in endophytic drought-stressed plants. Relatively lower levels of proline in endophytic plants than nonendophytic plants under stress has been reported by others (Elbersen and West, 1997;Hahn et al, 2008;Pandey et al, 2016;Shukla et al, 2012;Vazquez-de-Aldana et al, 2013;Yang et al, 2014), as has increased proline levels in endophytic plants under stress (Bae et al, 2009;Cong et al, 2015;Molina-Montenegro et al, 2016;Nagabhyru et al, 2013;Zhang and Nan, 2007) and no change in proline (Bayat et al, 2009;Nagabhyru et al, 2013). The proline response may depend on the host-endophyte interaction and the level of stress.…”

Section: Discussionmentioning

confidence: 67%

Metabolic responses of endophytic Nicotiana benthamiana plants experiencing water stress

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Sivasithamparam

et al. 2017

Environmental and Experimental Botany

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“…Karcher et al (2008) concluded that the reduction in DMY under water stress is a drought avoidance mechanism in most turf grasses. Chlorophyll content is a major determinant of photosynthetic capacity under stress, i.e., higher chlorophyll content and stability of it have been reported to be associated with drought tolerance (Mensah et al, 2006;Bayat et al, 2009). Thus, selecting genotypes based on increased or stable chlorophyll content may prevent yield loss under water stress.…”

Section: Resultsmentioning

confidence: 99%

Physiological and Tolerance Indices Useful for Drought Tolerance Selection in Smooth Bromegrass

et al. 2017

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In smooth bromegrass (Bromus inermis Leyss), few efforts have been made to develop rapid and reliable physiological indices for selection of persistent and drought‐tolerant genotypes. In addition, the association of these indices with seasonal growth activity, such as summer dormancy and autumn recovery, has not been studied. In this research, 36 genotypes of smooth bromegrass were clonally propagated and evaluated under water stress and nonstress conditions during 2013 to 2014. Water stress greatly influenced physiological functions and persistence, which affect plant growth and biomass production. Among the 36 randomly selected genotypes from the progeny of 25 half‐sib polycross families of smooth bromegrass, high genotypic variation was observed for all measured traits. Leaf proline content was not correlated with drought tolerance and persistence. However, carotenoid content and water‐soluble carbohydrates were correlated with drought tolerance and can be suggested for indirect selection of drought‐tolerant genotypes. Three genotypes (G8IHA, G13HUN, and 32HUN) were found to be more drought tolerant than others based on stress tolerance index, higher dry matter yield, summer dormancy, and relatively higher persistence and autumn recovery.

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Effects of endophytic fungi on some drought tolerance mechanisms of tall fescue in a hydroponics culture

Cited by 70 publications

References 26 publications

Fungal Endophyte (Epichloë festucae) Alters the Nutrient Content of Festuca rubra Regardless of Water Availability

Fungal Endophyte (Epichloë festucae) Alters the Nutrient Content of Festuca rubra Regardless of Water Availability

Metabolic responses of endophytic Nicotiana benthamiana plants experiencing water stress

Physiological and Tolerance Indices Useful for Drought Tolerance Selection in Smooth Bromegrass

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