Winter cold-tolerance thresholds in field-grownMiscanthushybrid rhizomes

Peixoto, Murilo de Melo; Friesen, Patrick Calvin; Sage, Rowan F.

doi:10.1093/jxb/erv093

Cited by 41 publications

(38 citation statements)

References 51 publications

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“…In the case of genotypes 2603, C124 and C148, the increased REL was statistically insignificant. Many studies use 50% electrolyte leakage as the critical viability threshold, although many plants perish after suffering more than 30% electrolyte leakage (Peixoto et al 2015). Comparing the individual genotypes, obviously, the highest values of REL were measured in stressed plants immediately after the effect of the freezing temperature -3°C (S1) in the C98 genotype (Figure 1b).…”

Section: Resultsmentioning

confidence: 99%

The effect of freezing temperature on physiological traits in sunflower

Hniličková¹,

Hejnák²,

Němcová³

et al. 2017

PLANT SOIL ENVIRON

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This study was conducted to identify the physiological mechanisms associated with the resistance and tolerance of young sunflower plants to freezing temperatures. The effect of overnight temperature –3°C on the maximal quantum efficiency of PSII (Fv/Fm), the relative electrolyte leakage (REL) and the osmotic potential (Ψπ) was determined in five genotypes of sunflower: C33, C98, C124 and C148 were chosen from the population of recombinant inbred lines (RILs) based on contrasted responses to low temperature, and a wild genotype 2603 that was chosen for its ability to maintain activities in cold conditions. The night temperature –3°C over the course of 10 h caused an immediate significant decrease of Fv/Fm in C33, C98, C124 and C148. In the case of genotype C98, the effect of this freezing temperature was manifested by a significant increase of REL. Significant changes of Ψπ, as a reaction to the effect of freezing temperatures, were not found in any of the monitored genotypes. The measurements of the physiological traits after 5 days of regeneration indicated the renewal of integrity of cellular structures and an increase of PSII reaction centre efficiency in all monitored genotypes. From the point of view of tolerance or sensitivity, the wild genotype 2603 showed itself as tolerant towards the tested freezing temperature, displaying insignificant differences with control plants in all monitored traits. Genotype C98 appears to be the most sensitive from the monitored set, with evident changes in two traits signalling frost damage.

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Section: Resultsmentioning

confidence: 99%

The effect of freezing temperature on physiological traits in sunflower

Hniličková¹,

Hejnák²,

Němcová³

et al. 2017

PLANT SOIL ENVIRON

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“…Previous controlled-environment studies have estimated the temperature at which 50% of isolated M×g '1993-1780' rhizomes are killed (LT 50 ) as ranging from −2.6°C to −4.4°C Fonteyne et al, 2016;Peixoto, Friesen, & Sage, 2015), which might have led one to predict lower survival rates at the Urbana and Dixon Springs locations than was observed based on the minimum temperatures at 10 cm below bare soil for each site (−6.2 and −5.3°C at Urbana and Dixon Springs, respectively). However, this apparent discrepancy between results from the laboratory and the field could be accounted for by the insulation of belowground rhizomes from the plant's aboveground crown, and/or avoidance of cold by rhizomes that grew deep in the soil (i.e., more than 10 cm belowground).…”

Section: Discussionmentioning

confidence: 99%

Winter hardiness of Miscanthus (I): Overwintering ability and yield of new Miscanthus ×giganteus genotypes in Illinois and Arkansas

et al. 2019

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Miscanthus ×giganteus (M×g) is an important bioenergy feedstock crop. However, biomass production of Miscanthus has been largely limited to one sterile triploid cultivar, M×g ‘1993‐1780’, which we demonstrate can have insufficient overwintering ability in temperate regions with cold winters. Key objectives for Miscanthus breeding include greater biomass yield and better adaptation to different production environments than M×g ‘1993‐1780’. In this study, we evaluated 13 M×g genotypes, including ‘1993‐1780’, in replicated field trials conducted for three years at Urbana, IL; Dixon Springs, IL; and Jonesboro, AR. Entries were phenotyped for first‐winter overwintering ability and plant hardiness (ratio of new tillers to old), yield in years 2 and 3, and first heading date, plant height, and culm number in years 1 and 2. We observed substantial variation for overwintering ability and biomass yield among the M×g genotypes tested and identified ones with better overwintering ability and/or higher biomass yield than ‘1993‐1780’. Most entries at Urbana were damaged during the first winter, whereas few or no entries were damaged at Dixon Springs or Jonesboro. However, M×g ‘Nagara’ was entirely undamaged during the first winter and produced high biomass yields at Urbana (19.7 Mg/ha in year 2 and 20.9 Mg/ha in year 3), whereas M×g ‘1993‐1780’ exhibited an overwintering loss of 29%, had severely damaged survivors (hardiness score of 25%), and reduced biomass yield (8.1 Mg/ha in year 2 and 16.2 Mg/ha in year 3), indicating that M×g ‘Nagara’ could be a better choice in hardiness zone 5 (average annual minimum air temperature of −23.3 to −28.9°C) or lower. In Dixon Springs, where M×g ‘1993‐1780’ was undamaged by the first winter, it yielded highest among all the entries (21.6 Mg/ha in year 3), though not significantly higher than M×g ‘Nagara’ (18.2 Mg/ha in year 3).

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“…In contrast to the survival of mature M×g ‘1993‐1780’ plants in this study, in a parallel study of first year M×g ‘1993‐1780’ plants, we observed losses of 29% during the 2013–2014 winter at Urbana, IL (Dong, Green, et al, ). Previous studies have estimated the temperature at which 50% of isolated rhizomes from mature plants were killed (LT 50 ) for M×g ‘1993‐1780’ to be −2.6°C (Fonteyne et al, ), −3.4°C (Clifton‐Brown & Lewandowski, ), or −4.4°C (Peixoto et al, ), but in the field, insulation of belowground rhizomes from the plant’s aboveground crown, and avoidance of cold by rhizomes that grow deep in the soil, can increase overwintering ability of mature plants. For example, under sod, the minimum temperature during the 2013–2014 winter at Urbana was only‐2.2°C at 10 cm and −1.4°C at 20 cm.…”

Section: Discussionmentioning

confidence: 99%

Winter hardiness of Miscanthus (II): Genetic mapping for overwintering ability and adaptation traits in three interconnected Miscanthus populations

et al. 2019

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Miscanthus × giganteus (M×g) is the primary species of Miscanthus for bioenergy feedstock production. The current leading biomass cultivar, M×g ‘1993‐1780’, is insufficiently adapted in temperate regions with cold winters such as USDA hardiness zone 5 (average annual minimum temperature of −28.9 to −23.3°C) or lower. Three interconnected Miscanthus F1 populations that shared a common parent were planted in a replicated field trial at Urbana, IL (hardiness zone 5b; average annual minimum temperature of −26.1 to −23.3°C) in spring 2011. The winter of 2013–2014 was especially cold in Urbana, with a minimum soil temperature at 10 cm of −6.2°C and a minimum air temperature of −25.3°C, giving us an opportunity to evaluate hardiness on established year‐3 plants. The parent in common to all three populations, M. sinensis ssp. condensatus ‘Cosmopolitan’, is native to maritime southern Japan, and in Urbana, it is winter‐damaged most years. In contrast, the three other parents, M. sacchariflorus ‘Robustus’ (MapA), M. sinensis ‘Silberturm’ (MapB), and M. sinensis ‘November Sunset’ (MapC), are typically winter hardy in Urbana. Nearly all MapA progeny plants survived and grew vigorously in spring 2014, whereas in MapB and MapC, many progeny plants did not survive the winter, and most of the survivors were severely damaged, with poor vigor. Negative correlations between overwintering ability and spring regrowth date and autumn dormancy date suggested that the genotypes most likely to survive winters were those that emerged early in spring and/or went dormant early in autumn. Using joint‐population analysis, we identified 53 quantitative trait loci (QTLs) for nine adaptation traits, including nine QTLs for overwintering ability and 11 for spring hardiness scores. Many biologically intuitive candidate genes were observed within or near the QTLs detected in this study, suggesting their validity and potential for further study.

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Winter cold-tolerance thresholds in field-grownMiscanthushybrid rhizomes

Abstract: Highlight: LT50 values in diploid rhizomes of Miscanthus indicated that they retain mechanisms that confer higher tolerance of lower temperatures than occurs in the more-productive polyploid lines.

Cited by 41 publications

References 51 publications

The effect of freezing temperature on physiological traits in sunflower

The effect of freezing temperature on physiological traits in sunflower

Winter hardiness of Miscanthus (I): Overwintering ability and yield of new Miscanthus ×giganteus genotypes in Illinois and Arkansas

Winter hardiness of Miscanthus (II): Genetic mapping for overwintering ability and adaptation traits in three interconnected Miscanthus populations

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