Code:
OIV
406
Name: Resistance to magnesium deficiency
Category:
,
GROUP OF CHARACTERISTICS,
ORGAN
Subcategory:
MAGNESIUM,
ABIOTIC RESISTANCE,
PLANT
Code: OIV 406
Name: Resistance to magnesium deficiency
Category: , GROUP OF CHARACTERISTICS, ORGAN
Subcategory: MAGNESIUM, ABIOTIC RESISTANCE, PLANT
Primay descriptor priority list
For a quick characterisation of varieties the Genres CT 96 No81 - partners compiled a Primary description priority list. The list encompasses 14 priority one primary descriptors. The chosen descriptors show a good discriminating power between varieties. Most of them are easy to score.
Description
The role of the rootstock affects the expression of symptoms on the grafted variety; to specify whether it is a rootstock, a grafted variety (indicate the rootstock), or an ungrafted variety. Observations starting from the beginning of veraison on the young leaves with punctiform necrosis, and adult leaves with chromatic alterations along the edges and intervein areas, with green veins. Bunches: possible desiccation of the tip of the stalk. Observations should be done on the same environment and, whether the case, the vinifera varieties should be grafted on the same rootstock. 1 = High incidence of symptomatic plants, even if distributed in patches, with leaf symptoms strongly expressed on adult leaves and weakly in young leaves. 3 = Medium-high incidence of symptomatic plants and clear leaf symptoms. 5 = Few and scattered plants with mild symptoms. 7 = Low incidence of deficiency and slightly symptoms on basal leaves. 9 = No visible symptoms.Level expression
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