Open AccessShading Effects on Dry Matter Partitioning, Remobilization of Stored Reserves and Early Season Vegetative Development of Grapevines in the Year after Treatment
Author(s) -
Steven J. McArtney,
D. C. Ferree
Publication year - 1999
Publication title -
journal of the american society for horticultural science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.408
H-Index - 80
eISSN - 2327-9788
pISSN - 0003-1062
DOI - 10.21273/jashs.124.6.591
Subject(s) - shading , xylem , dry matter , shoot , dry weight , growing season , biology , vegetative reproduction , annual growth cycle of grapevines , horticulture , botany , dry season , agronomy , art , visual arts , ecology
Grapevines ( Vitis vinifera L.) were covered with an 80% neutral shade cloth from flowering until harvest to investigate effects of shade on early season vegetative development in the year after treatment. Shading reduced root dry weight, the concentration of soluble sugars, and amino nitrogen in xylem sap at budbreak, and leaf area expansion in the following year. Dry weight of roots on both shaded and nonshaded vines declined by more than 50% in the first 3 weeks after budbreak and then began to increase, but still had not recovered to prebudbreak levels, 10 weeks after budbreak. Total leaf area per shoot was reduced in the year after shading due to both fewer and smaller leaves.