بررسی برخی صفات فیزیولوژیکی گیاه مرزه (satureja hortensis ) تحت شرایط تنش بور

Abstract
To study the effects of different levels of Boron on the some physiological characteristics of Savory
plant this experiment was carried out using a randomized complete design with five treatments and six
replicates in Research greenhouse, University of Birjand. In this experiment effect of different boron
levels (0, 5, 10, 25 and 50 mg/l) on variables such as fresh and dry weight of vegetative parts, leaf
relative water content, specific leaf area and proline content of savory were examined.The greatest
amount of fresh weight (1.292 gr) obtained in treated plants with 10 mg/l boron and the lowest fresh
weight (0.888 gr) in plants that irrigated with 50 mg/l boron was observed. The lowest amount leaf
relative water content (67%) in 5 mg/l boron treatment and the highest (78/31) in 50 mg/l boron
recorded. Proline content significantly increased as the concentration of applied boron was increased.
Hence, the lowest amount of proline obtained in control (3 μmol/gr dw). Overall, it can be concluded of
savory plant can tolerate boron stress in irrigation water during vegetative phase up to 10 mg/l
without negative impact on growth and yield.