Gene Details:

• Gene ID: Vitvi06g00281
• Gene Symbol: VvPIP2
• Gene Name: aquaporin PIP2
• Genome: Vitis vinifera PN40024.v4
• Species: Vitis vinifera

Functional Descriptions:

• The Grapevine Root-Specific Aquaporin **VvPIP2|4N **|**VvPIP2|4N **Controls Root Hydraulic Conductance and Leaf Gas Exchange under Well-Watered Conditions But Not under Water Stress.
• Expression of **VvPIP2|4N **|**VvPIP2|4N **in Xenopus laevis oocytes increased their swelling rate 54-fold. Northern blot and quantitative reverse transcription-polymerase chain reaction analyses showed that **VvPIP2|4N **|**VvPIP2|4N **is the most expressed PIP2 gene in root.
• We then constitutively overexpressed **VvPIP2|4N **|**VvPIP2|4N **in grape ‘Brachetto’, and in the resulting transgenic plants we analyzed (1) the expression of endogenous and transgenic **VvPIP2|4N **|**VvPIP2|4N **and of four other aquaporins, (2) whole-plant, root, and leaf ecophysiological parameters, and (3) leaf abscisic acid content. Expression of transgenic **VvPIP2|4N **|**VvPIP2|4N **inhibited neither the expression of the endogenous gene nor that of other PIP aquaporins in both root and leaf.
• The leaf component of total plant hydraulic resistance was low and unaffected by overexpression of **VvPIP2|4N **|4N. Upon water stress, the overexpression of **VvPIP2|4N **|**VvPIP2|4N **induced a surge in leaf abscisic acid content and a decrease in stomatal conductance and leaf gas exchange.

Function-related keywords:

• leaf ,  root ,  resistance ,  stress ,  stomatal ,  abscisic-acid

Literature:

• The grapevine root-specific aquaporin VvPIP2;4N controls root hydraulic conductance and leaf gas exchange under well-watered conditions but not under water stress.   DOI:  10.1104/pp.112.203455 ;  PMID:  22923680

Related News:

Gene Resources:

• NCBI ID: DQ358107.1
• UniProt accessions: Q2HZF5

Orthologs:

Sequences: