The management of extracellular ice by petioles of frost-resistant herbaceous plants

Annals of Botany
M E McCullyC X Huang

Abstract

Some frost-tolerant herbaceous plants droop and wilt during frost events and recover turgor and posture on thawing. It has long been known that when plant tissues freeze, extracellular ice forms. Distributions of ice and water in frost-frozen and recovered petioles of Trifolium repens and Escholschzia californica were visualized. Petioles of intact plants were cryo-fixed, planed to smooth transverse faces, and examined in a cryo-SEM. With frost-freezing, parenchyma tissues shrank to approx. one-third of their natural volume with marked cytorrhysis of the cells, and massive blocks of extracellular icicles grew under the epidermis (poppy) or epidermis and subepidermis (clover), leaving these layers intact but widely separated from the parenchyma except at specially structured anchorages overlying vascular bundles. On thawing, the extracellular ice was reabsorbed by the expanding parenchyma, and surface tissues again contacted the internal tissues at weak junctions (termed faults). These movements of water into and from the fault zones occurred repeatedly at each frost/thaw event, and are interpreted to explain the turgor changes that led to wilting and recovery. Ice accumulations at tri-cellular junctions with intercellular space...Continue Reading

Citations

Mar 17, 2006·The New Phytologist·M J Canny, C X Huang
Jul 25, 2009·Plant, Cell & Environment·Foteini HassiotouErik J Veneklaas
Jun 8, 2010·Plant, Cell & Environment·Thomas LennéMarilyn C Ball
Sep 16, 2005·BioEssays : News and Reviews in Molecular, Cellular and Developmental Biology·Pragya SharmaRenu Deswal
Mar 14, 2012·Physiologia Plantarum·Lawrence V Gusta, Michael Wisniewski
Oct 9, 2018·Frontiers in Plant Science·Michael WisniewskiRajeev Arora
Oct 19, 2019·Plant & Cell Physiology·Valentin AmbroiseKjell Sergeant
Aug 9, 2016·Plant, Cell & Environment·Masaya IshikawaYoji Arata
Apr 9, 2021·Critical Reviews in Biotechnology·Ali RazaRajeev K Varshney
Jul 10, 2021·Plant & Cell Physiology·Daisuke TakahashiDavid P Livingston Iii

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