Physiological traits related to drought tolerance in tall fescue

Ebrahimiyan, Maryam; Majidi, Mohammad Mahdi; Mirlohi, Aghafakhr; Noroozi, Abbas

doi:10.1007/s10681-012-0808-8

Cited by 47 publications

(48 citation statements)

References 37 publications

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“…In several other plants, such as grasses with summer dormancy or tree buds with winter dormancy, spontaneous mutations or divergent selection can yield plants which lack dormancy [4,64,[80][81][82]. Depending on the environmental stress that is placed on these plants, responses can be neutral, positive or negative.…”

Section: Uncoupling Dormancy From Winter-survival In Switchgrassmentioning

confidence: 99%

“…Depending on the environmental stress that is placed on these plants, responses can be neutral, positive or negative. However, the basal mechanisms affecting these changes appear to come from specific genes (DAM genes in peach; [64]) which are of importance to dormancy in other dicot species or from a suite of traits that primarily affect the onset leaf senescence in grasses experiencing summer dormancy [4,6,81]. These studies point to potential mechanisms that tie into the overall integration of timely aerial senescence to the onset of dormancy in the perenniating structures, and provide targets for study in the temperate C 4 perennial grasses.…”

Section: Uncoupling Dormancy From Winter-survival In Switchgrassmentioning

confidence: 99%

“…This allows the plant to resume growth with prior stored reserves once conditions are favorable. Seasonal dormancy can occur in the summer months (generally induced by lack of water and/or high temperature) [4][5][6] or in the winter months (generally induced by low light and low temperature limitation; see below). It is possible that summer dormancy in grasses might share some similar molecular pathways to winter dormancy in temperate C 4 grasses (for example signaling responses to senescence, desiccation, and meristem metabolism).…”

Section: Introductionmentioning

confidence: 99%

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Senescence, dormancy and tillering in perennial C4 grasses

2014

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a b s t r a c tPerennial, temperate, C 4 grasses, such as switchgrass and miscanthus have been tabbed as sources of herbaceous biomass for the production of green fuels and chemicals based on a number of positive agronomic traits. Although there is important literature on the management of these species for biomass production on marginal lands, numerous aspects of their biology are as yet unexplored at the molecular level. Perenniality, a key agronomic trait, is a function of plant dormancy and winter survival of the belowground parts of the plants. These include the crowns, rhizomes and meristems that will produce tillers. Maintaining meristem viability is critical for the continued survival of the plants. Plant tillers emerge from the dormant crown and rhizome meristems at the start of the growing period in the spring, progress through a phase of vegetative growth, followed by flowering and eventually undergo senescence. There is nutrient mobilization from the aerial portions of the plant to the crowns and rhizomes during tiller senescence. Signals arising from the shoots and from the environment can be expected to be integrated as the plants enter into dormancy. Plant senescence and dormancy have been well studied in several dicot species and offer a potential framework to understand these processes in temperate C 4 perennial grasses. The availability of latitudinally adapted populations for switchgrass presents an opportunity to dissect molecular mechanisms that can impact senescence, dormancy and winter survival. Given the large increase in genomic and other resources for switchgrass, it is anticipated that projected molecular studies with switchgrass will have a broader impact on related species.

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Section: Uncoupling Dormancy From Winter-survival In Switchgrassmentioning

confidence: 99%

Section: Uncoupling Dormancy From Winter-survival In Switchgrassmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Senescence, dormancy and tillering in perennial C4 grasses

2014

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“…A few other authors recorded an increase in the chlorophyll content under moderate stress conditions and explained it as likely being due to a slowing down of cell growth in relation to the chlorophyll synthesis. Ebrahimiyan et al (2013) for instance, observed a relationship between the chlorophyll content and dry matter production during moderate stress conditions. This implied that the loss of leaf weight after moderate stress could produce a relative rise in the chlorophyll content.…”

Section: Index Of Total Chlorophyllmentioning

confidence: 97%

“…Another physiological parameter sensitive to stress due to water conditions is the chlorophyll content (Dutra et al, 2012;Ebrahimiyan et al, 2013;Huang et al, 2013), which has proven to be as effective as the other techniques used to measure gas exchange in distinguishing between the genotypes tolerant susceptible to drought. Further, it presents equally well as the variables of chlorophyll fluorescence with the extra advantage of being accurate, economical, fast and nondestructive.…”

Section: Introductionmentioning

confidence: 99%

Determination of parameters for selection of Eucalyptus clones tolerant to drought

Silva¹,

Souza²,

Rodrigues³

et al. 2016

Afr. J. Agric. Res.

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Climatic changes have induced the spread of aridity in many parts of the globe. Eucalyptus plantations show wide variations in productivity due to several factors, including climatic changes. Therefore, Eucalyptus genotypes that can adapt to such conditions is very welcome. Thus, an evaluation was done by comparing the physiological responses of two Eucalyptus genotypes, tolerant and droughtsensitive. They were assessed in different stages of experimental period and the rate of chlorophyll and chlorophyll fluorescence (minimal fluorescence and maximal fluorescence) were recorded. The potential photosystem II (PSII) quantum efficiency was then calculated. A decline in the rate of total chlorophyll (values below 25) and in the minimal fluorescence (values below 190) in clone sensitive due to the water stress was observed, while an increase was noted in clone tolerant to aridity. A reduction in the maximal fluorescence and photochemical efficiency was recorded in the genotype not being irrigated, with an earlier and more severe effect being verified for the sensitive genotype with values below 300 and 0.40, respectively. The variables studied confirm that clone tolerant exhibits greater drought tolerance, thus indicating that the photochemical efficiency of photosystem II is a reliable tool that enables the nondestructive choice of genotypes naturally tolerant to water scarcity conditions.

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Genotypic‐specific response to exogenous applied salicylic acid in tall fescue under different irrigation conditions

et al. 2020

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Salicylic acid (SA) is one of the endogenous plant growth regulators that play an important role in the regulation of plant growth and development in response to water deficit. Genotypic-specific response to exogenous applied SA in terms of physiological, enzymatic activity, and yield traits is poorly understood in tall fescue [Lolium arundinaceum (Schreb.) Wimm. syn. Festuca arundinacea Schreb.]. Twenty genotypes of tall fescue (selected from a broad germplasm) were assessed at field condition for morphological and physiological characteristics during 2016 and 2017 under three irrigation levels (normal, mild, and intense drought stress) in the presence of two SA concentrations (0 and 1 mM). Mild and intense drought stress conditions led to depression in photosynthetic pigments including chlorophyll a and b and total chlorophyll contents, plant height, crown diameter, and forage yield, despite increases in proline content, carotenoids, catalase, peroxidase, and ascorbate peroxidase activities.Application of SA decreased the adverse effects of drought stress by elevation of photosynthetic pigments and nonenzyme and enzymatic antioxidant activities and could enhance forage yield and drought tolerance in tall fescue genotypes. High genetic variation was observed among the genotypes in their response to the application of SA under drought stress conditions, and genotypes 3L and 1E were recognized as drought tolerant and stable genotypes for future breeding programs.

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Physiological traits related to drought tolerance in tall fescue

Cited by 47 publications

References 37 publications

Senescence, dormancy and tillering in perennial C4 grasses

Senescence, dormancy and tillering in perennial C4 grasses

Determination of parameters for selection of Eucalyptus clones tolerant to drought

Genotypic‐specific response to exogenous applied salicylic acid in tall fescue under different irrigation conditions

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