scholarly journals Comparative Analysis of the Heat Stable Proteome of Radicles of Medicago truncatula Seeds during Germination Identifies Late Embryogenesis Abundant Proteins Associated with Desiccation Tolerance

2006 ◽  
Vol 140 (4) ◽  
pp. 1418-1436 ◽  
Author(s):  
Julie Boudet ◽  
Julia Buitink ◽  
Folkert A. Hoekstra ◽  
Hélène Rogniaux ◽  
Colette Larré ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Medicago Truncatula ◽  
Desiccation Tolerance ◽  
Late Embryogenesis Abundant ◽  
Late Embryogenesis Abundant Proteins ◽  
Heat Stable ◽  
Late Embryogenesis

scholarly journals Desiccation tolerance in streptophyte algae and the algae to land plant transition: evolution of LEA and MIP protein families within the Viridiplantae

2020 ◽  
Vol 71 (11) ◽  
pp. 3270-3278 ◽  
Author(s):  
Burkhard Becker ◽  
Xuehuan Feng ◽  
Yanbin Yin ◽  
Andreas Holzinger
Keyword(s):  
Desiccation Tolerance ◽  
Experimental Studies ◽  
Sister Group ◽  
Land Plant ◽  
Late Embryogenesis Abundant ◽  
Land Plants ◽  
Desiccation Stress ◽  
Protein Families ◽  
Intrinsic Protein ◽  
Late Embryogenesis

Abstract The present review summarizes the effects of desiccation in streptophyte green algae, as numerous experimental studies have been performed over the past decade particularly in the early branching streptophyte Klebsormidium sp. and the late branching Zygnema circumcarinatum. The latter genus gives its name to the Zygenmatophyceae, the sister group to land plants. For both organisms, transcriptomic investigations of desiccation stress are available, and illustrate a high variability in the stress response depending on the conditions and the strains used. However, overall, the responses of both organisms to desiccation stress are very similar to that of land plants. We highlight the evolution of two highly regulated protein families, the late embryogenesis abundant (LEA) proteins and the major intrinsic protein (MIP) family. Chlorophytes and streptophytes encode LEA4 and LEA5, while LEA2 have so far only been found in streptophyte algae, indicating an evolutionary origin in this group. Within the MIP family, a high transcriptomic regulation of a tonoplast intrinsic protein (TIP) has been found for the first time outside the embryophytes in Z. circumcarinatum. The MIP family became more complex on the way to terrestrialization but simplified afterwards. These observations suggest a key role for water transport proteins in desiccation tolerance of streptophytes.

Evidence for multiple group 1 late embryogenesis abundant proteins in encysted embryos of Artemia and their organelles

2010 ◽  
Vol 148 (5) ◽  
pp. 581-592 ◽  
Author(s):  
Alden H. Warner ◽  
Olga Miroshnychenko ◽  
Anna Kozarova ◽  
Panayiotis O. Vacratsis ◽  
Thomas H. MacRae ◽  
...  
Keyword(s):  
Late Embryogenesis Abundant ◽  
Late Embryogenesis Abundant Proteins ◽  
Multiple Group ◽  
Late Embryogenesis ◽  
Group 1

Approaches to elucidate the basis of desiccation-tolerance in seeds

1997 ◽  
Vol 7 (2) ◽  
pp. 75-95 ◽  
Author(s):  
Allison R. Kermode
Keyword(s):  
Water Deficit ◽  
Desiccation Tolerance ◽  
Protein Function ◽  
High Water ◽  
Late Embryogenesis Abundant ◽  
Plant Responses ◽  
Late Embryogenesis ◽  
Essential Components ◽  
Orthodox Seeds ◽  
Adverse Environmental Conditions

AbstractPlants undergo a series of physiological, biochemical and molecular changes in response to adverse environmental conditions or stresses such as drought, low temperature or high salt. Several genes and their corresponding proteins have been described that may play a role in withstanding water-deficit-related stresses or full desiccation. In particular, sugars and late-embryogenesis-abundant (LEA) proteins have received the most attention. Plant responses to water-deficit and desiccation have been well-characterized at the molecular level; however, pinpointing the precise roles of the gene products in protecting cells under conditions of water deficit remains a challenging task. While few plants are capable of withstanding full desiccation, most seeds undergo this event as a pre-programmed and final stage in their development. These are the so-called ‘orthodox’ seeds. In contrast to seeds of orthodox species, those of recalcitrant species do not acquire desiccation tolerance during their development and are shed from the parent plant at relatively high water contents. The essential components of desiccation tolerance of seeds are likely to involve the ability to effect repair upon subsequent rehydration as well as the ability to accumulate protective substances that limit the amount of damage which otherwise would be caused by water loss. Studies have begun to examine whether the desiccation sensitivity of recalcitrant seeds is at least partially the result of an insufficient accumulation of LEA-type proteins, or whether other factors (including a lack of protective sugars) are more important. This review assesses some of these studies as well as recent research to understand gene and protein function using transgenic host plant systems.

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