Abstract
This study was evaluated the effect of different rootstocks, scion, and drought stress
levels on yield, yield components and biochemical characteristics of four commercial
tomato cultivars. In this regard, the combinations of three rootstocks (Dashtestan,
Dorahe, and Mond) and four scions (Ra’ad, Matine, Super chief, and Rockstone) were
investigated under three drought stress treatments, including 50, 75 and 100 % water
requirement. After grafting, grafting success rate (percent) and some vegetative and
reproductive parameters were measured. Considering the main effect of rootstock, the
highest percentage of success in grafting unit (up to 50%) was obtained by the
Dashtestan rootstock, while the lowest (40%) was obtained by the Mond rootstock. The
results showed that drought stress and different rootstocks had significant effects on
plant height (p<0.05), average fruit weight, flower and fruit numbers, protein and
lycopene contents (p<0.01). On the other hand, there were significant interactions
between drought stress, rootstock and scion in respect of average fruit weight, flower
and fruit number, TSS, firmness, protein, lycopene, and superoxide dismutase(SOD).
So that, in the conditions of the experiment, drought stress caused an increase in some
parameters such as fruit TSS and firmness, the contents of carotenoids, flower number,
protein content and activities of catalase(CAT), peroxidase, and superoxide dismutase
enzymes. It could be concluded that the best combinations of rootstock and scion were
Ra’ad and Super Chief scions, respectively on Dashtestan rootstock. So that, in many
evaluated parameters these rootstock-scion combinations were better than others.
Sepideh Kazemi, Abdolrasool Zakerin, Vahid Abdossi, Pezhman Moradi. (2021) Fruit yield and quality of the grafted tomatoes under different drought stress conditions, Asian Journal of Agriculture and Biology, Volume-09, Issue-1.
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