Arid
DOI10.1111/pce.12529
Freezing avoidance by supercooling in Olea europaea cultivars: the role of apoplastic water, solute content and cell wall rigidity
Arias, Nadia S.1,2; Bucci, Sandra J.1,2; Scholz, Fabian G.1,2; Goldstein, Guillermo1,3,4
通讯作者Bucci, Sandra J.
来源期刊PLANT CELL AND ENVIRONMENT
ISSN0140-7791
EISSN1365-3040
出版年2015
卷号38期号:10页码:2061-2070
英文摘要

Plants can avoid freezing damage by preventing extracellular ice formation below the equilibrium freezing temperature (supercooling). We used Olea europaea cultivars to assess which traits contribute to avoid ice nucleation at sub-zero temperatures. Seasonal leaf water relations, non-structural carbohydrates, nitrogen and tissue damage and ice nucleation temperatures in different plant parts were determined in five cultivars growing in the Patagonian cold desert. Ice seeding in roots occurred at higher temperatures than in stems and leaves. Leaves of cold acclimated cultivars super-cooled down to -13 degrees C, substantially lower than the minimum air temperatures observed in the study site. During winter, leaf ice nucleation and leaf freezing damage (LT50) occurred at similar temperatures, typical of plant tissues that supercool. Higher leaf density and cell wall rigidity were observed during winter, consistent with a substantial acclimation to sub-zero temperatures. Larger supercooling capacity and lower LT50 were observed in cold-acclimated cultivars with higher osmotically active solute content, higher tissue elastic adjustments and lower apoplastic water. Irreversible leaf damage was only observed in laboratory experiments at very low temperatures, but not in the field. A comparative analysis of closely related plants avoids phylogenetic independence bias in a comparative study of adaptations to survive low temperatures.


英文关键词freezing resistance ice nucleation LT50 non-structural carbohydrate olive
类型Article
语种英语
国家Argentina ; USA
收录类别SCI-E
WOS记录号WOS:000363884200009
WOS关键词COLD-HARDINESS ; SOLUBLE SUGARS ; FROST TOLERANCE ; ACCLIMATION ; SHOOTS ; MECHANISM ; PRESSURE ; PROTEINS ; SUCROSE ; LEAVES
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/189652
作者单位1.Consejo Nacl Invest Cient & Tecn, RA-1033 Buenos Aires, DF, Argentina;
2.Univ Nacl Patagonia San Juan Bosco, Grp Estudios Biofis & Ecofisiol GEBEF, Dept Biol, Fac Ciencias Nat, RA-9000 Comodoro Rivadavia, Argentina;
3.Univ Buenos Aires, FCEyN, Dept Ecol Genet & Evoluc, LEF, RA-1425 Buenos Aires, DF, Argentina;
4.Univ Miami, Dept Biol, Coral Gables, FL 33124 USA
推荐引用方式
GB/T 7714
Arias, Nadia S.,Bucci, Sandra J.,Scholz, Fabian G.,et al. Freezing avoidance by supercooling in Olea europaea cultivars: the role of apoplastic water, solute content and cell wall rigidity[J],2015,38(10):2061-2070.
APA Arias, Nadia S.,Bucci, Sandra J.,Scholz, Fabian G.,&Goldstein, Guillermo.(2015).Freezing avoidance by supercooling in Olea europaea cultivars: the role of apoplastic water, solute content and cell wall rigidity.PLANT CELL AND ENVIRONMENT,38(10),2061-2070.
MLA Arias, Nadia S.,et al."Freezing avoidance by supercooling in Olea europaea cultivars: the role of apoplastic water, solute content and cell wall rigidity".PLANT CELL AND ENVIRONMENT 38.10(2015):2061-2070.
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