An integrative view of sodium chloride stress and phaeomoniella sp. inoculation on growth and nutrient accumulation and patterning in in vitro grapevine plants
2011
Silva, Helena Oliveira da | Santos, Conceição
Combined effects of salt stress and esca disease in grapevines were studied. Grapevines (Vitis vinifera L.) were exposed to 0, 20, and 100 mM sodium chloride (NaCl) and inoculated with Phaeomoniella chlamydospora conidia. Salt stress and inoculation reduced plant RGR and LAR and this effect was higher when both stressors were present. Salt stress decreased potassium (K), calcium (Ca), magnesium (Mg), and phosphorus (P) in roots and shoots with K being more affected in roots, and Ca more affected in shoots. Fungi inoculation per se also affected accumulation and/or allocation of all nutrients. These effects were aggravated with time and combination of both stresses, showing that salt stress and inoculation acted in synergy. Some micronutrients decreased in shoots, but accumulated in roots, suggesting effects on translocation, while others were reduced in both. This is the first report on temporal evaluation of combined effects of salt stress and P. chlamydospora inoculation on grapevine growth and nutrient changes.
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