The Nature of Summer Dormancy in Perennial Grasses

Laude, Horton M.

doi:10.1086/335770

Cited by 114 publications

(104 citation statements)

References 4 publications

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“…The annual recurrent periods of winter stresses or summer droughts have led to the evolution of seasonal acclimation and de-acclimation processes regulating the level of resistance to seasonal stresses in perennial grasses (Laude, 1953;Volaire and Norton, 2006;Preston and Sandve, 2013). These processes, which are largely regulated by temperature and photoperiod, correlate with changes in growth, reproductive development and dormancy status (Preston and Sandve, 2013;Norton et al, 2009;Gillespie and Volaire, 2017), and latitudinal clines in responses to temperature and photoperiod have been described (Cooper, 1964).…”

Section: Breeding For the Future Climatementioning

confidence: 99%

How can forage production in Nordic and Mediterranean Europe adapt to the challenges and opportunities arising from climate change?

Ergon

Seddaiu

Korhonen

et al. 2018

European Journal of Agronomy

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Climate change and its eﬀects on grassland productivity vary across Europe. The Mediterranean and Nordic regions represent the opposite ends of a gradient of changes in temperature and precipitation patterns, with increasingly warmer and wetter winters in the north and increasingly warmer and drier summers in the south. Warming and elevated concentration of atmospheric CO2 may boost forage production in the Nordic region. Production in many Mediterranean areas is likely to become even more challenged by drought in the future, but elevated CO2 can to some extent alleviate drought limitation on photosynthesis and growth. In both regions, climate change will aﬀect forage quality and lead to modiﬁcations of the annual productivity cycles, with an extended growing season in the Nordic region and a shift towards winter in the Mediterranean region. This will require adaptations in defoliation and fertilization strategies. The identity of species and mixtures with optimal performance is likelyto shift somewhat inresponse to altered climate and management systems. Itis argued that breeding of grassland species should aimto (i) improve plantstrategies to cope with relevant abiotic stresses and (ii) optimize growth and phenology to new seasonal variation, and that plant diversity at all levels is a good adaptation strategy

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Section: Breeding For the Future Climatementioning

confidence: 99%

How can forage production in Nordic and Mediterranean Europe adapt to the challenges and opportunities arising from climate change?

Ergon

Seddaiu

Korhonen

et al. 2018

European Journal of Agronomy

View full text Add to dashboard Cite

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“…It is an evolutionary response that some grasses adopted as an avoidance strategy to escape summer drought and heat [24] with summer drought stress [33]. Therefore, growing summer-active fescue cultivars under conditions of limited moisture is not recommended [33].…”

Section: Summer Dormancymentioning

confidence: 99%

Insights into Seasonal Dormancy of Perennial Herbaceous Forages

Adhikari¹,

Razar²,

Paudel³

et al. 2017

AJPS

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Seasonal dormancy is an adaptive mechanism where plants suspend growth and become physiologically inactive to avoid extreme environmental conditions. Environmental factors like temperature, photoperiod, nutrients, and soil moisture control plant growth and development through various complex molecular mechanisms. Crown and seed dormancy of plants are mostly influenced by day length and temperature. Genes and physiological pathways triggered by these two factors along with genotype variability are some targets to manipulate seasonal dormancy. There is genetic variation in the depth and duration of seasonal dormancy. Therefore, their genetic manipulation is possible. Manipulations of summer and fall dormancy are relatively easier compared to winter dormancy because plants require protection of their apical meristem from freezing temperatures and limited water supply. Genetic factors that regulate seed dormancy may also have regulatory role for seasonal dormancy of the maternal plants. Limited genetic and genomic information are available for seasonal dormancy in herbaceous perennial species. Knowledge of genes controlling seasonal dormancy of eudicots, forest trees, and horticultural crops could be interpolated to explore possible dormancy mechanisms in perennial forages. This study reviews current knowledge of seasonal dormancy of herbaceous forages emphasizing the genetic and physiological context that would be valuable to breeders and plant biologists to expand the production season of perennial species by developing non-dormant and semi-dormant cultivars.

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“…Grasses temporarily slow the growth of meristem to avoid drought damage and to allow survival (McWilliam, 1968). Poaceae forage plants, such as Poa scabrella (Laude, 1953), Poa bullbosa (Volaire et al, 2001), and some populations of forage grasses such as Dactylis glomerata 'Kasbah' (Norton et al, 2006), all exhibit summer dormancy.…”

Section: Dormancy Is Another Countermeasure To Survive From Stressesmentioning

confidence: 99%