Development of inflorescence primordia in Vitis vinifera L. cv. Chardonnay from hot and cool climates

Abstract

Background and Aims: The purpose of this study was to gain a quantitative understanding of environmental effects on the formation of yield potential; it is critical that the timing of anlagen initiation and differentiation in latent buds is defined for economically important Vitis vinifera L. cultivars in a range of environments. Methods and Results: This study combined scanning electron microscopy with light microscopy to compare the timing and extent of inflorescence primordia (IP) initiation and differentiation (branching) in primary latent buds of Chardonnay vines grown in a hot (mean January temperature (MJT) 22.3°C) and a cool (MJT 18.1°C) climate. Initiation of anlagen (uncommitted pr..