[صفحه اصلی ]   [Archive]  
:: صفحه اصلي :: درباره نشريه :: آخرين شماره :: تمام شماره‌ها :: جستجو :: ثبت نام :: ارسال مقاله :: تماس با ما ::
:: دوره 6، شماره 22 - ( 7-1394 ) ::
جلد 6 شماره 22 صفحات 1-12 برگشت به فهرست نسخه ها
Stress Response of Dominant Forest Tree Species South of the Caspian Sea in Relation to Soil from Coast to Upland
چکیده:   (1350 مشاهده)
Distribution and growth of plant species is affected by many factors including abiotic (topography,
altitude and soil) and biotic (root symbiosis) factors. In light of global warming, recent findings
advocate microhabitats and micro-conditions of the root zone and canopy ambiance as determining
factors in sustaining of plant populations. Although, occurrence of ectomycorrhizal (ECM) and
non-mycorrhizal plants in forests south of the Caspian Sea have been studied extensively, stress
response of tree species in relation to altitude and soil (texture and contents of heavy metals) has
not been investigated much. This research investigated the antioxidant stress response of three
dominant tree species (Alnus subcordata C.A.Mey, Acer velutinum Boiss. and Carpinus betulus L.)
of three selected hyrcanian forests south of the Caspian Sea (Javaherdeh, Dalkhani and Tonekabon)
at 4 altitudes (sea level, 500, 1000 and 1500 m above sea level). Results showed some nonenzymatic
antioxidants, such as flavonoids and anthocyanins contents correlated with
ectomycorrhizal root colonization, differed amongst trees in corresponding altitudes and was
generally greater in upper altitudes. Activity of antioxidant enzymes like catalase and peroxidase
and total protein content were affected by soil physicochemical factors. A.velutinum grew better in
sandy soils while A.subcordata dominanted clay soils. Although, nutrient status of the soil was
different within each soil type, cation competition between Ca and Mg and high concentration of
Fe in soil most likely affected root performance and consequentially pigment content in leaves,
particularly in upper altitudes where temperatures were low and UV radiation was strong. UV
radiation induces anthocyanin biosynthesis which mainly protects the DNA from damage. In this
research, Chllorophyll/ Carotenoid ratio reduced with increasing altitude perhaps because of
photoprotection.
متن کامل [PDF 176 kb]   (195 دریافت)    
نوع مطالعه: بنیادی | موضوع مقاله: Marine Biology
دریافت: ۱۳۹۶/۱۰/۲۴ | پذیرش: ۱۳۹۶/۱۰/۲۴ | انتشار: ۱۳۹۶/۱۰/۲۴
ارسال نظر درباره این مقاله
نام کاربری یا پست الکترونیک شما:

CAPTCHA code


XML   English Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Zare-Maivan H, Lotfi Fard F, Tayebi Z. Stress Response of Dominant Forest Tree Species South of the Caspian Sea in Relation to Soil from Coast to Upland. JPG. 2015; 6 (22) :1-12
URL: http://jpg.inio.ac.ir/article-1-441-fa.html

Stress Response of Dominant Forest Tree Species South of the Caspian Sea in Relation to Soil from Coast to Upland. نشریه علمی پژوهشی خلیج فارس. 1394; 6 (22) :1-12

URL: http://jpg.inio.ac.ir/article-1-441-fa.html



دوره 6، شماره 22 - ( 7-1394 ) برگشت به فهرست نسخه ها
نشریه علمی پژوهشی خلیج فارس Journal of the Persian Gulf
Persian site map - English site map - Created in 0.09 seconds with 31 queries by YEKTAWEB 3735