کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5478534 | 1521806 | 2017 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The comparative study for physiological and biochemical mechanisms of Thalassiosira pseudonana and Chaetoceros calcitrans in response to different light intensities
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کلمات کلیدی
NPQRLCFv′/Fm′Chl arETRPFDmaximal photochemical efficiency of PSIISRMFv/Fm - Fv / FmROS - ROSβ-car - β ماشینβ-carotene - β-کاروتنNon-photochemical quenching - خنک سازی غیر فتوشیمیاییSOD - سدSuperoxide dismutase - سوکسوکس دیسموتازLight intensity - شدت نورCAR - ماشینrelative electron transport rate - نرخ انتقال الکترون نسبتاselected reaction monitoring - نظارت بر واکنش انتخاب شدهCarotenoid - کاروتنوئیدChlorophyll a - کلروفیل aReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
Both Thalassiosira pseudonana and Chaetoceros calcitrans are important species of marine microalgae. Their adaptive capacity to light intensity significantly varies during actual cultivation. We investigated the responses of these two species to different light intensities at 25 °C through analyses of photoacclimation, antioxidant ability as well as many physiological and biochemical parameters. The growth rate of T. pseudonana was positively correlated with light intensity in the first 8 days. However, after that, the greatest growth rate of T. pseudonana was found at a light intensity of 40 μmol mâ 2 sâ 1. For C. calcitrans, the growth rate at 200 μmol mâ 2 sâ 1 was the highest among the three light intensities in the first 10 days, while the growth rate at 120 μmol mâ 2 sâ 1 became the highest after 10 days. Both algae could yield the most chlorophyll a at 40 μmol mâ 2 sâ 1, and β-carotene content was increased in T. pseudonana but decreased in C. calcitrans with the increase of light intensity. Moreover, maximal photochemical efficiency of PSII (Fv/Fm) and effective photochemical efficiency of PSII (Fvâ²/Fmâ²) in T. pseudonana were decreased with the increase of light intensity, while non-photochemical quenching (NPQ) and superoxide dismutase (SOD) activities were increased. However, Fv/Fm and Fvâ²/Fmâ² in C. calcitrans under all light intensities remained relatively constant, and Fv/Fm was maintained at around 0.6. NPQ was increased and SOD activity was decreased in C. calcitrans with the increase of light intensity. These findings suggested that T. pseudonana employed a more positive physiological strategy for adaptation to environmental stress under low light intensity, while C. calcitrans possessed a good physiological strategy for adaptation to environmental stress under high light intensity. Taken together, we provided a better understanding of the growth effects of these two microalgae under different light intensities and offered novel insights into their mass culture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Algal Research - Volume 27, November 2017, Pages 89-98
Journal: Algal Research - Volume 27, November 2017, Pages 89-98
نویسندگان
Runtao Zhang, Zhouyan Kong, Sihan Chen, Zhaoshou Ran, Mengwei Ye, Jilin Xu, Chengxu Zhou, Kai Liao, Jiayi Cao, Xiaojun Yan,