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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erv093
|2 doi
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|a pubmed24n1342.xml
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|a DE-627
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|e rakwb
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|a eng
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|a Peixoto, Murilo de Melo
|e verfasserin
|4 aut
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|a Winter cold-tolerance thresholds in field-grown Miscanthus hybrid rhizomes
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|c 2015
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Completed 05.04.2016
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|a Date Revised 23.03.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © The Author 2015. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a The cold tolerance of winter-dormant rhizomes was evaluated in diploid, allotriploid, and allotetraploid hybrids of Miscanthus sinensis and Miscanthus sacchariflorus grown in a field setting. Two artificial freezing protocols were tested: one lowered the temperature continuously by 1°C h(-1) to the treatment temperature and another lowered the temperature in stages of 24h each to the treatment temperature. Electrolyte leakage and rhizome sprouting assays after the cold treatment assessed plant and tissue viability. Results from the continuous-cooling trial showed that Miscanthus rhizomes from all genotypes tolerated temperatures as low as -6.5 °C; however, the slower, staged-cooling procedure enabled rhizomes from two diploid lines to survive temperatures as low as -14 °C. Allopolyploid genotypes showed no change in the lethal temperature threshold between the continuous and staged-cooling procedure, indicating that they have little ability to acclimate to subzero temperatures. The results demonstrated that rhizomes from diploid Miscanthus lines have superior cold tolerance that could be exploited to improve performance in more productive polyploid lines. With expected levels of soil insulation, low winter air temperatures should not harm rhizomes of tolerant diploid genotypes of Miscanthus in temperate to sub-boreal climates (up to 60°N); however, the observed winter cold in sub-boreal climates could harm rhizomes of existing polyploid varieties of Miscanthus and thus reduce stand performance
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Cold tolerance
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|a LT50
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|a Miscanthus
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|a electrolyte leakage
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|a perennial C4 grasses
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|a rhizome.
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|a Friesen, Patrick Calvin
|e verfasserin
|4 aut
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|a Sage, Rowan F
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 66(2015), 14 vom: 04. Juli, Seite 4415-25
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:66
|g year:2015
|g number:14
|g day:04
|g month:07
|g pages:4415-25
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|u http://dx.doi.org/10.1093/jxb/erv093
|3 Volltext
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