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Initiation and regulation of water deficit-induced abscisic acid accumulation in maize leaves and roots: cellular volume and water relations.
J Exp Bot. 2001 Feb; 52(355):295-300.JE

Abstract

Water deficit-induced ABA accumulation in relation to cellular water relations was investigated in maize root and leaf tissues. While polyethylene glycol (PEG) treatment led to a significant increase of ABA content in both root and leaf tissues, ethylene glycol (EG), a permeable monomer of PEG, had no effect on ABA accumulation at similar or much lower osmotic potentials. A rapid and massive accumulation of ABA in leaf tissues occurred at a specific threshold of PEG 6000 concentration, about 20% (w/v), and closely coincided with the start of the tissue weight loss and the obvious decrease of cellular osmotic potential. Pretreatment with EG lowered the cell sap osmotic potential and also lowered the capability of both root and leaf tissues to accumulate ABA in response to further air-drying or PEG treatment. When samples were dehydrated and incubated under pressure, a method to maintain high water potential and pressure potential during dehydration, ABA accumulation was similar to those dehydrated and incubated under atmospheric pressure. Such results suggest that both the absolute water potential and pressure potential per se had no direct effects on the dehydration-induced ABA accumulation. The results have provided evidence that the initiation of ABA accumulation is related to the weight loss of tissues or changes in cellular volume rather than the cell water relation parameters, and the capability of ABA accumulation can be regulated by cellular osmotic potential.

Authors+Show Affiliations

Jia W
Department of Biology, Hong Kong Baptist University, Kowloon Tong, Hong Kong, ROC.
Zhang J
No affiliation info available
Liang J
No affiliation info available

MeSH

Abscisic AcidAtmospheric PressureCell SizeEthylene GlycolIn Vitro TechniquesIsotope LabelingOsmolar ConcentrationOsmotic PressurePlant Growth RegulatorsPlant LeavesPlant RootsPolyethylene GlycolsPressureWaterZea mays

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

11283174

Citation

Jia, W, et al. "Initiation and Regulation of Water Deficit-induced Abscisic Acid Accumulation in Maize Leaves and Roots: Cellular Volume and Water Relations." Journal of Experimental Botany, vol. 52, no. 355, 2001, pp. 295-300.
Jia W, Zhang J, Liang J. Initiation and regulation of water deficit-induced abscisic acid accumulation in maize leaves and roots: cellular volume and water relations. J Exp Bot. 2001;52(355):295-300.
Jia, W., Zhang, J., & Liang, J. (2001). Initiation and regulation of water deficit-induced abscisic acid accumulation in maize leaves and roots: cellular volume and water relations. Journal of Experimental Botany, 52(355), 295-300.
Jia W, Zhang J, Liang J. Initiation and Regulation of Water Deficit-induced Abscisic Acid Accumulation in Maize Leaves and Roots: Cellular Volume and Water Relations. J Exp Bot. 2001;52(355):295-300. PubMed PMID: 11283174.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Initiation and regulation of water deficit-induced abscisic acid accumulation in maize leaves and roots: cellular volume and water relations. AU - Jia,W, AU - Zhang,J, AU - Liang,J, PY - 2001/4/3/pubmed PY - 2001/9/6/medline PY - 2001/4/3/entrez SP - 295 EP - 300 JF - Journal of experimental botany JO - J Exp Bot VL - 52 IS - 355 N2 - Water deficit-induced ABA accumulation in relation to cellular water relations was investigated in maize root and leaf tissues. While polyethylene glycol (PEG) treatment led to a significant increase of ABA content in both root and leaf tissues, ethylene glycol (EG), a permeable monomer of PEG, had no effect on ABA accumulation at similar or much lower osmotic potentials. A rapid and massive accumulation of ABA in leaf tissues occurred at a specific threshold of PEG 6000 concentration, about 20% (w/v), and closely coincided with the start of the tissue weight loss and the obvious decrease of cellular osmotic potential. Pretreatment with EG lowered the cell sap osmotic potential and also lowered the capability of both root and leaf tissues to accumulate ABA in response to further air-drying or PEG treatment. When samples were dehydrated and incubated under pressure, a method to maintain high water potential and pressure potential during dehydration, ABA accumulation was similar to those dehydrated and incubated under atmospheric pressure. Such results suggest that both the absolute water potential and pressure potential per se had no direct effects on the dehydration-induced ABA accumulation. The results have provided evidence that the initiation of ABA accumulation is related to the weight loss of tissues or changes in cellular volume rather than the cell water relation parameters, and the capability of ABA accumulation can be regulated by cellular osmotic potential. SN - 0022-0957 UR - https://www.unboundmedicine.com/medline/citation/11283174/Initiation_and_regulation_of_water_deficit_induced_abscisic_acid_accumulation_in_maize_leaves_and_roots:_cellular_volume_and_water_relations_ DB - PRIME DP - Unbound Medicine ER -