کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8493565 1552804 2018 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Water depth-dependant photosynthetic and growth rates of Gracilaria lemaneiformis, with special reference to effects of solar UV radiation
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Water depth-dependant photosynthetic and growth rates of Gracilaria lemaneiformis, with special reference to effects of solar UV radiation
چکیده انگلیسی
To optimize the farming strategy of economically important seaweeds, we grew Gracilaria lemaneiformis at different seawater depths under natural solar radiation with or without UV irradiances. Our results showed that solar UV radiation (UVR, 295-395 nm) significantly inhibited its growth and photosynthesis in the surface seawater; however, such a negative effects became inverse at 1.7 m with levels of UVR being about 11.7 W m− 2. The maximal growth rates were found at 1.7, 0.8 m when the thalli grown at PAR + UVR or PAR only conditions, respectively. UV-absorbing compounds in the algal thalli were up to 85% higher under PAR + UVR compared to PAR alone treatment and they increased with decreased depths even in the absence of UVR. The enhanced growth rate in the presence of UVR could be attributed to enhanced photosynthesis under moderate levels of solar radiation by UV-A. Our study clearly showed that UV-induced growth inhibition could be minimized or avoided by optimizing the alga's farming depth in different waters of different transparency, so that Gracilaria's biomass production could be increased.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 484, 1 February 2018, Pages 28-31
نویسندگان
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