01164naa a2200145 a 450000100080000000500110000800800410001910000200006024500780008026000090015852007750016765000120094270000180095477300460097216487452014-09-11       2000    bl ---       0--  u    #d1 aALVES, A. A. C.  aResponse of cassava to water deficitbleaf area growth and abscisic acid.  c2000  aCassava (Manihot esculenta Crantz) responds to decreases in water status by pronounced stomatal closure and decreased leaf area growth. Many water deficit responses are thought to be regulated by abscisic acid (ABA). To evaluate the extent to which ABA accumulated in a temporal pattern related to water deficit and leaf area growth, five cassava genotypes were grown in greenhouse conditions and subjected to water deficit and recovery treatments during the vegetaitve-growth stage. Young and nature leaves were sampled for analysis of area growth and ABA. Under water deficit, leaves from all genotypes rapidly accumulated large amounts of ABA in both mature and young leaves. Correspondingly, young leaves halted leaf expansion growth and tranpiration rate decreased.  acassava1 aSETTER, T. L.  tCrop Sciencegv.40, n.1, p.131-137, 2000.