effects of salinity stress on dry weight and macronutrients contents of two olive varieties
نویسندگان
چکیده
a greenhouse experiment was carried out to evaluate the effects of salinity stress on growth and macroelements contents of two olive varieties under hydroponic conditions. in the research, one-year old saplings of two olive varieties, ‘zard’ and ‘mission’, were subjected to different salinity levels induced by nacl including 0, 4, 8, 12 and 16 dsm-1 for 5 months. based on the results, total dry weights of the varieties were decreased at 16 dsm-1 compared to control up to 63 and 85% at ‘mission’ and ‘zard’, respectively. also, a 25% reduction in total dry weight was observed under salinities of 7 and 3.6 dsm-1 for ‘mission’ and ‘zard’, respectively. salinity was decreased the concentrations of macronutrients and increased the concentrations of na and cl in roots and leveas of the both varieties. compared to control, na and cl concentrations in leaves and roots was increased under salinity of 16 dsm-1 at 1660 and 679% for na and 1069 and 506% for cl. in all salinity levels, na and cl concentrations in the leaves and roots of 'zard' variety were more than that of 'mission'. thesa data demonstrated that ‘mission’ has a more salinity tolerance than ‘zard’, and could be used as a salt-tolerant variety for cultivation under salinity conditions. the defence mechanisms of ‘mission’ are restricting in absorbtion and translocation of na to aerial parts and accumulate a proper concentrations of k in leaves.
منابع مشابه
the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
this study compared the different effects of form-focused guided planning vs. meaning-focused guided planning on iranian pre-intermediate students’ task performance. the study lasted for three weeks and concentrated on eight english structures. forty five pre-intermediate iranian students were randomly assigned to three groups of guided planning focus-on-form group (gpfg), guided planning focus...
15 صفحه اولthe effects of time planning and task complexity on accuracy of narrative task performance
هدف اصلی این تحقیق بررسی تاثیر برنامه ریزی زمانی، هم چنین افزایش میزان پیچیدگی تکالیف در نظر گرفته شده بصورت همزمان، بر دقت و صحت و پیچیدگی عملکرد نوشتاری زبان آموزان می باشد. بدین منظور، 50 نفر از دانش آموزان دختر در رده ی سنی 16 الی 18 سال به عنوان شرکت کنندگان در این زمینه ی تحقیق در نظر گرفته شدند و به دو گروه آزمایشی و کنترل بصورت اتفاقی تقسیم شدند. اعضای گروه آزمایشی هر دو تکلیف ساده و پی...
the effects of previewing and providing background knowledge on iranian university efl learners’ comprehension of literary and academic texts
abstract poor reading comprehension can result in failure in using references, benefiting from professional gatherings and resources, keeping up with the growing body of knowledge in the virtual world of the internet, and failing to achieve in efl programs. the purpose of the present quasi-experimental study was to explore the effects of background knowledge and previewing narrative and expos...
15 صفحه اولEffect of biostimulants on water content and micronutrients and macronutrients of Puccinellia distans under salinity stress
Abstract: Biostimulants are a variety of compounds of plant and animal origin that are used to improve the quality of plant growth. In this study, which was conducted in 1399, the effect of commercial biostimulant Algabon®, algal biostimulant [seaweed extract (SWE)], and namid (amino acid biostimulant) on the plant Puccinellia distans to reduce the effects of salinity stress by improving growt...
متن کاملEffect of Salinity Stress and Exogenously Applied Methyl Jasmonate on Growth and Physiological Traits of Two Carthamus tinctorius Varieties
Salinity stress is one of the main limiting factors for optimum agricultural productivity of safflower, Carthamus tinctorius L., in arid and semi-arid regions. It could leads to significant changes in plant biochemical, physiological, and growth traits. Salinity induced endogenous rise in jasmonic acid and its methyl esters (MeJA) has been reported. In the present study, effects of salinity str...
متن کاملEffects of salt stress on some growth parameters and chemical contents of two forage sorghum lines
Abstract Soil salinity has been recognized as the most serious problems for agriculture in arid and semi-arid areas of the world. To evaluate the changes in some growth parameters and chemical composition of two forage sorghum (Sorghum bicolor var. sudanense lines (KFS1, KFS2) under salinity stress [0 (control), 3, 6, 9, 12 dS/m of sodium chloride], a pot experiment was carried out at Colleg...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
به زراعی کشاورزیجلد ۱۸، شماره ۲، صفحات ۳۵۹-۳۷۱
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023