کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5763188 | 1625146 | 2017 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physiological responses of Populus sibirica to different irrigation regimes for reforestation in arid area
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کلمات کلیدی
Chl aTR0/RCPIABSmaximum quantum yield of PSII photochemistryET0/RCDI0/RCChl bLWPinternal CO2 concentrationSLAABS/RC - ABS / RCwell-watered - آب آشامیدنیDesertification - بیابان زاییReforestation - جنگل زراعیPhotochemical quenching - رفع عکس شیمیاییSpecific leaf area - سطح برگ مخصوصCross-section - سطح مقطعPerformance índex - عملکرد شاخصPhotosynthesis - فتوسنتزSEM - مدل معادلات ساختاری / میکروسکوپ الکترونی روبشیreaction center - مرکز واکنشScanning electron microscopy - میکروسکوپ الکترونی روبشیtranspiration rate - نرخ تنفسStomatal conductance - هدایت گرمایشیLeaf water potential - پتانسیل آب برگTotal carotenoids - کل کاروتنوئیدهاChlorophyll a - کلروفیل achlorophyll b - کلروفیل بtotal chlorophyll - کلروفیل کلWater deficit - کمبود آب
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study was conducted in Elsen tasarkhai, an arid region in Mongolia, to investigate the physiological response of Populus sibirica to different irrigation regimes and to suggest optimal irrigation intervals for successful reforestation in Mongolia. Two-year-old P. sibirica seedlings were planted, and three different irrigation regimes (well-watered (WW), irrigation every 2Â days; moderate drought (MD), irrigation every 5Â days; severe drought (SD), irrigation every 7Â days) were applied. Although the survival rate was unaffected by the applied water deficit intensity, the relative growth rate was significantly reduced in SD in accordance with a decline in carbon assimilation. Although the total chlorophyll content also decreased as the water deficit increased, the chlorophyll b (Chl b) and total carotenoid (Car T) levels increased to dissipate the excess energy. Increased quantum efficiencies in the SD condition were caused by the enlargement of the reaction center (RC) antenne, indicating increased of excess energy dissipation. Therefore, P. sibirica showed resistance to a certain degree of water deficit intensity (MD and SD). The irrigation regime of SD appeared to be adequate for P. sibirica based on survival rate and physiological traits. These results might enlighten the development of effective irrigation systems in arid area.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: South African Journal of Botany - Volume 112, September 2017, Pages 329-335
Journal: South African Journal of Botany - Volume 112, September 2017, Pages 329-335
نویسندگان
T.Y. Lee, S.M. Je, M.J. Kwak, K. Akhmadi, E. Tumurbaatar, I. Khaine, H.K. Lee, J.H. Jang, H.N. Kim, H.J. Ahn, S.Y. Woo,