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PIP1 aquaporin levels in stems of Giarraffa (GIA), Leccino (LEC) and Maurino (MAU) cultivars under control (CTRL) and drought-stress (DS) conditions, at the beginning of stress (t0), two weeks later (t2) and four weeks later (t4). (A) Membranes immunoblotted with anti-aquaporin antibodies from the above experimental groups; (B) relative blot quantification expressed as integrated density (i.d.).
