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首页> 外文期刊>Polar biology >Is survival after ice encasement related with sugar distribution in organs of the Antarctic plants Deschampsia antarctica Desv. (Poaceae) and Colobanthus quitensis (Kunth) Bartl. (Cary ophyllaceae) ?
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Is survival after ice encasement related with sugar distribution in organs of the Antarctic plants Deschampsia antarctica Desv. (Poaceae) and Colobanthus quitensis (Kunth) Bartl. (Cary ophyllaceae) ?

机译：冰封后的存活与南极植物Deschampsia antarctica Desv的器官中的糖分布有关吗？ （禾本科）和西兰花（Kunth）Bartl。 （石竹科）？

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摘要

Deschampsia antarctica and Colobanthus quitensis are usually covered by snow from April to November. It is unknown whether the leaves survive ice encasement. This study proposes that day length influences sugar distribution in C. quitensis and that sugar accumulation favors re-growths after an ice encasement period. The objectives of this work were: (1) to study the effect of day length and low temperature on sugar distribution in organs ofrnC. quitensis and (2) to study the survival and recovery ofrnD. antarctica and C. quitensis after a period of ice encasement. Extremely short day length (SD) (8/16 h) and long day length (LD) (21/3 h) was used, medium (MD) (16/8 h) corresponding at control day length. Also two temperatures: 4℃ (cold acclimated) and 15℃ (control) were evaluated. Both factors: day length and cold acclimation significantly affected sugar distribution in C. quitensis. Both species presented a high rate of survival after ice encasement. D. antarctica conserved most of their leaves green, while C. quitensis presented dead leaves and new shoots in plants from cold acclimated under SD. Only in D. antarctica the number of green leaves after ice encasement was positivelyrncorrelated with sugar content in underground organs. The high sugar content in green leaves of both species suggested fast activity recovery after snow melting.
机译：4月至11月，南极洲Deschampsia和Colobanthus quitensis通常被雪覆盖。叶片是否能在冰块中幸存仍然是未知的。这项研究提出，日长会影响C. quitensis的糖分分布，并且在冰封期后，糖分的积累有利于重生。这项工作的目的是：（1）研究日长和低温对rnC器官中糖分布的影响。 （2）研究rnD的存活和恢复。经过一段冰封后的南极洲和C. quitensis。使用极短的日长（SD）（8/16 h）和长的日长（LD）（21/3 h），中号（MD）（16/8 h）对应于对照日长。还评估了两个温度：4℃（冷适应）和15℃（对照）。两种因素：日长和寒冷适应都显着影响了C. quitensis的糖分分布。两种物种在被冰包裹后都具有很高的存活率。南极D.将其大部分叶子保存为绿色，而C. quitensis在SD条件下从寒冷适应的植物中呈现出枯叶和新芽。仅在南极D.南极洲，冰包裹后的绿叶数量与地下器官中的糖含量呈正相关。两种物种的绿叶中糖含量高，表明融雪后活性迅速恢复。

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  • 来源
    《Polar biology》 |2009年第4期|583-591|共9页
  • 作者

    Alejandra Zuniga-Feest; Luisa Bascunan-Godoy; Marjorie Reyes-Diaz; Leon A. Bravo; Luis J. Corcuera;

  • 作者单位

    Facultad de Ciencias, Instituto de Geociencias, Universidad Austral de Chile, Campus Isla Teja, Casilla 567, Valdivia, Chile;

    Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile;

    Facultad de Ingenieria, Instituto de Agroindustrias, Ciencias y Administracion, Universidad de la Frontera, Casilla 54-D, Temuco, Chile;

    Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile;

    Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Casilla 160-C, Concepcion, Chile;

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  • 正文语种 eng
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  • 关键词

    sugars allocation; cold acclimation; ice encasement; antarctic plants;

    机译：糖分配;冷适应冰盒南极植物;

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