+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Programmed proteome response for drought avoidance/tolerance in the root of a C(3) xerophyte (wild watermelon) under water deficits

Programmed proteome response for drought avoidance/tolerance in the root of a C(3) xerophyte (wild watermelon) under water deficits

Plant and Cell Physiology 49(2): 226-241

Water availability is a critical determinant for the growth and ecological distribution of terrestrial plants. Although some xerophytes are unique regarding their highly developed root architecture and the successful adaptation to arid environments, virtually nothing is known about the molecular mechanisms underlying this adaptation. Here, we report physiological and molecular responses of wild watermelon (Citrullus lanatus sp.), which exhibits extraordinarily high drought resistance. At the early stage of drought stress, root development of wild watermelon was significantly enhanced compared with that of the irrigated plants, indicating the activation of a drought avoidance mechanism for absorbing water from deep soil layers. Consistent with this observation, comparative proteome analysis revealed that many proteins induced in the early stage of drought stress are involved in root morphogenesis and carbon/nitrogen metabolism, which may contribute to the drought avoidance via the enhancement of root growth. On the other hand, lignin synthesis-related proteins and molecular chaperones, which may function in the enhancement of physical desiccation tolerance and maintenance of protein integrity, respectively, were induced mostly at the later stage of drought stress. Our findings suggest that this xerophyte switches survival strategies from drought avoidance to drought tolerance during the progression of drought stress, by regulating its root proteome in a temporally programmed manner. This study provides new insights into the complex molecular networks within plant roots involved in the adaptation to adverse environments.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 021609647

Download citation: RISBibTeXText

PMID: 18178965

DOI: 10.1093/pcp/pcm180

Related references

Dynamic changes in the leaf proteome of a C3 xerophyte, Citrullus lanatus (wild watermelon), in response to water deficit. Planta 233(5): 947-960, 2011

Potential involvement of drought-induced Ran GTPase CLRan1 in root growth enhancement in a xerophyte wild watermelon. Bioscience, Biotechnology, and Biochemistry 80(10): 1907-1916, 2017

Proteomic analysis of avoidance and defense mechanisms to drought stress in the root of wild watermelon. Plant and Cell Physiology 47: S101-S101, 2006

Responses of wild watermelon to drought stress: accumulation of an ArgE homologue and citrulline in leaves during water deficits. Plant & Cell Physiology 41(7): 864-873, 2000

Medicago truncatula and Glycine max: Different Drought Tolerance and Similar Local Response of the Root Nodule Proteome. Journal of Proteome Research 14(12): 5240-5251, 2016

Establishment of a transgenic hairy root system in wild and domesticated watermelon (Citrullus lanatus) for studying root vigor under drought. Plant Cell Reports 29(7): 771-778, 2011

Drought tolerance versus drought avoidance: A comparison of plant-water relations in herbaceous wetland plants subjected to water withdrawal and repletion. Wetlands 27(3): 656-667, 2007

Relationship of dehydration rate to drought avoidance, dehydration tolerance and dehydration avoidance of cabbage leaves, and to their acclimation during drought-induced water stress. Plant, Cell and Environment 8(4): 287-296, 1985

Citrulline and DRIP-1 protein (ArgE homologue) in drought tolerance of wild watermelon. Annals of Botany 89(Special Issue): 825-832, 2002

Root osmotic adjustment promotes higher water status in shoots: fact or fallacy of evidence linking drought tolerance and avoidance mechanisms in two crop species. Plant Physiology and Biochemistry New Delhi 21(1): 9-13, 1994

Hydroxyl radical scavenging activity of citrulline Implication for drought-tolerance of wild watermelon. Plant & Cell Physiology 42(Supplement): s134, 2001

Identification of drought-responsible proteins in the root of wild watermelon by proteomic analysis. Plant and Cell Physiology 46: S74-S74, 2005

Regulation of the root development mechanism involved in Ran GTPase of wild watermelon under drought stress. Plant and Cell Physiology 47: S101-S101, 2006

Pyramiding of drought avoidance/tolerance mechanisms - earliness, root weight and root length through multiple introgression in chickpea (Cicer arietinum L.). Indian Journal of Genetics and Plant Breeding 70(1): 91-93, 2010

Citrulline functions as the efficient hydroxyl radical scavenger Implication for the drought-tolerance of wild watermelon plant. Photosynthesis Research 69(1-3): 170, 2001