ISHS Acta Horticulturae 726: IV International Symposium on Pistachios and Almonds
GROWTH AND LEAF CHEMICAL COMPOSITION OF THREE PISTACHIO (PISTACIA VERA L.) ROOTSTOCK SEEDLINGS IN RESPONSE TO BORON EXCESS IN IRRIGATION WATER |
| Authors: | H. Hokmabadi, K. Arzani, B. Gheibi, F. Hadavi |
| Keywords: | boron, toxicity, pistachio, carbon isotope discrimination |
| Abstract:
In order to determine the effects boron excess in irrigation water on relative growth rate (RGR), net assimilation rate on a leaf weight basis (NAR) and leaf weight ratio (LWR) of pistachio, three pistachio rootstocks including Badami-e-Zarand, Sarakhs and Ghazvini were used. Rootstocks were grown in soil in the 8 liter polyethylene pots in the controlled greenhouses at Tarbiat Modarres University (TMU), Iran. Treatments were 0, 20 and 40 mg.L-1 boron in irrigation water. Treatments were applied to one-year-old pistachio rootstock seedlings in three days intervals with irrigation water. Some of the plants were randomly selected and destructively harvested before applying treatments (day 0) and 30 and 60 days after treatments started (DATS). Growth and physiological characters such as number of leaves, leaf area, plant height, root length, stem fresh and dry weight, proline accumulation in the leaf and leaf, stem and root carbon isotope discrimination were measured. Results indicated that boron treatments did not show any significant effect on growth rate and proline accumulation after two months exposure to the treatments, but results showed that by increasing boron concentration in irrigation water in 60 DATS, in the leaves and roots decreased but there was no change in of stems | |
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