poikilohydry

释义与例句

n.
  1. 1.

    The condition of being poikilohydric; the lack of structural or functional mechanisms to actively regulate the equilibrium between the concentration of water in cell tissue and that in the environment.

    不可数 生物 植物学

    Poikilohydry occurs in such organisms as lichens and bryophytes, which lack mechanisms such as waterproofing cuticles or stomata that can help resist desiccation.

    Frequently, poikilohydry is coupled with the capacity to tolerate dehydration or low water content of cell tissue and to recover from it without physiological damage.

    2011, T. G. Allan Green, Leopoldo G. Sancho, Ana Pintado, Chapter 6: Ecobiology of Desiccation/Rehydration Cycles in Mosses and Lichens, Ulrich Lüttge, Erwin Beck, Dorothea Bartels (editors), Plant Desiccation Tolerance, Springer, Ecological Studies 215, page 113, The strategy of poikilohydry was almost certainly primitive and evolved from the production of desiccation-tolerant spores (Oliver et al. 2000). Organisms employing poikilohydry are confined to a small overall size, in particular because of the limitations to water transport that relies on capillarity (Proctor and Tuba 2002).

词源

From poikilo- + -hydry or a noun-forming modification of poikilohydric (see -y); compare homoiohydry.

来源：wiktionary