کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4569057 | 1331322 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Response to drought and salt stress of lemon 'Fino 49' under field conditions: Water relations, osmotic adjustment and gas exchange
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کلمات کلیدی
osmotic potential at full turgorACO2RWCθvGas exchange - تبادل گازDrought-stress - تنش خشکیOsmotic adjustment - تنظیم اسموتیDrought - خشکسالیWater relations - روابط آبSalinity - شوریintercellular CO2 concentration - غلظت CO2 بین سلولیVolumetric soil water content - محتوای آب خاکستریLeaf relative water content - محتوای نسبی آب برگBulk modulus of elasticity - مدول انبساطی کششیnet CO2 assimilation rate - میزان جذب CO2 خالصLeaf transpiration rate - نرخ تبخیر برگStomatal conductance - هدایت گرمایشیOsmotic potential - پتانسیل اسمزی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش باغداری
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Response to drought and salt stress of lemon 'Fino 49' under field conditions: Water relations, osmotic adjustment and gas exchange Response to drought and salt stress of lemon 'Fino 49' under field conditions: Water relations, osmotic adjustment and gas exchange](/preview/png/4569057.png)
چکیده انگلیسی
Drought and salinity are two of the most important factors limiting the lemon yield in south-eastern Spain. The effects of drought and salt stress, applied independently, on water relations, osmotic adjustment and gas exchange in the highest evapotranspiration period were studied to compare the tolerance and adaptive mechanisms of 13-year-old 'Fino 49' lemon trees, in immature and mature leaves. The study was carried out in an experimental orchard located in Torre Pacheco (Murcia). Three treatments were applied: Control, well-irrigated; drought-stress (DS), non-irrigated from 15th May to 7th July and salinity, irrigated with 30 mM NaCl from 1st March to 7th July. At the end of the experiment, only DS trees showed a decreased leaf stem water potential (Ψmd). Under DS conditions, both types of leaf lost turgor and did not show any osmotic or elastic mechanism to maintain leaf turgor. Osmotic adjustment was the main tolerance mechanism for maintenance of turgor under salt stress, and was achieved by the uptake of Clâ ions. Gas-exchange parameters were reduced by DS but not by salinity, stomatal closure being the main adaptive mechanism for avoidance of water loss and maintenance of leaf turgor. Salinity gave rise to greater Clâ accumulation in mature than in immature leaves. The increase of proline in immature leaves due to DS indicates greater damage than in mature leaves.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Scientia Horticulturae - Volume 122, Issue 1, 1 September 2009, Pages 83-90
Journal: Scientia Horticulturae - Volume 122, Issue 1, 1 September 2009, Pages 83-90
نویسندگان
J.G. Pérez-Pérez, J.M. Robles, J.C. Tovar, P. BotÃa.,