ISHS Acta Horticulturae 603: VIII International Conference on Grape Genetics and Breeding
GRAPEVINE IRON-CHLOROSIS OCCURRENCE AND STILBENE ROOT CONCENTRATION AS AFFECTED BY THE ROOTSTOCK AND ARBUSCULAR MYCORRHIZAL INFECTION |
| Authors: | L. Bavaresco, S. Pezzutto, A. Fornaroli, F. Ferrari |
| Keywords: | grapevine, rootstock, iron-chlorosis, photosynthesis, stilbenes, mycorrhiza. |
| Abstract:
Vitis vinifera L. cv. Chardonnay clone SMA 130 was grafted on the following hybrid rootstocks: V. berlandieri x V. riparia 420 A, Kober 5BB and S.O.4; V. berlandieri x V. rupestris 1103 P and 140 Ru; V. vinifera x V. berlandieri 41B. Each graft combination was grown in pot of a non calcareous soil, a calcareous soil, a sterilized calcareous soil and a calcareous soil infected by AM fungus Glomus mosseae. During the second growth year, leaf chlorosis (SPAD readings), Fe concentration and gas exchange were tested, while at the end of the growing cycle shoot and root dry matter production, P and Fe shoot content, trans-resveratrol and trans-piceid root concentration were analysed. The most significant findings were: a) calcareous soil decreased photosynthesis rate, as compared to the non calcareous one, for all rootstocks except for 140 Ru b) mycorrhyzal infection increased leaf SPAD readings and photosynthesis rate in the plants grafted on 420 A, and 1103 P rootstocks, over the control, and acted as stilbene elicitor; c) mycorrhization increased the total dry matter production over the untreated plants; d) soil sterilization increased the leaf SPAD readings over the control; e) lime-stress conditions increased root stilbene (especially trans-piceid) concentration over non-stressed plants. | |
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