کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5764041 | 1625805 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Water salinity effects on growth and nitrogen assimilation rate of mangrove (Kandelia candel) seedlings
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Mangrove is one of the dominant plants in tropical and sub-tropical estuarine ecosystems. The understanding of growth and nitrogen (N) assimilation rates of mangrove at different water salinities can be beneficial for evaluating the response of mangroves to increased anthropogenic N loading into these systems. We investigated the effect of salinity on growth and N assimilation of Kandelia candel (L) Druce under the phytotron conditions at alternating temperatures of 25 °C (day) and 20 °C (night) with 16-h light at â¼300 μmol photons mâ2 sâ1. The experiment included four salinity treatments (0, 8.8, 17.5 and 35 psu) and two N sources (NO3â and NH4+). With increasing salinity, mangrove shoot and root biomass decreased, but its hypocotyl biomass increased. Thus, the total biomass yield of mangrove remained unchanged in different salinity treatments. Nevertheless, N assimilation rate measured by the 15N stable isotope technique was significantly reduced from about 2.2 mg N gâ1 biomass hrâ1 under control conditions (0 psu) to 0.9 mg N gâ1 biomass hrâ1 under 35 psu. Mangrove favored nitrate than ammonium at low salinity (0 psu), but preferred NH4+ to NO3â at higher salinity (17.5 and 35 psu).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquatic Botany - Volume 137, January 2017, Pages 50-55
Journal: Aquatic Botany - Volume 137, January 2017, Pages 50-55
نویسندگان
Yo-Jin Shiau, Shui-Cheng Lee, Tsai-Huei Chen, Guanglong Tian, Chih-Yu Chiu,