ISHS Acta Horticulturae 632: XXVI International Horticultural Congress: Citrus and Other Subtropical and Tropical Fruit Crops: Issues, Advances and Opportunities
VIROID INDUCED CHANGES IN THE YIELD COMPONENTS OF PERSIAN LIME TREES (CITRUS LATIFOLIA TAN.) |
| Authors: | M. Aranguren, R. Pérez, D. Rodríguez |
| Keywords: | exocortis, cachexia, foliar area, flowering, production, quality |
| Abstract:
The effects of the inoculation with four citrus viroid isolates on some vegetative and reproductive growth variables of `SRA-58 Persian’ lime trees (Citrus latifolia Tan.) grafted on Citrus macrophylla West. were evaluated seven years after planting. The isolates that contained the cachexia pathogenic variant of the HSVd viroid (CVd-IIb) forming a complex with CVd-IV or with exocortis (CEVd), induced significant shortening of the shoots and reduction of the canopy diameter, height and volume with respect to healthy plants. The number and size of leaves, total foliar size and flowering decreased; whereas the production efficiency was slightly higher in the inoculated plants. The isolates containing CVd-III, combined with CEVd or HSVd (CVd-IIa), reduced the expression of these variables so that they were not so aggressive on this scion/rootstock combination. The distribution of the fruits according to commercial size in all the plants inoculated with viroids, shifted towards medium to small-sized ones (43-50 mm), but there were no other important effects on the other quality variables. | |
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