INFLUENCE OF TEMPERATURE AND NITROGEN CONCENTRATION ON PHOTOSYNTHESIS OF DUNALIELLA-VIRIDIS TEODORESCO

被引：18

作者：

JIMENEZ, C

NIELL, FX

机构：

[1] Departamento de Ecologia, Facultad de Ciencias, Universidad de Málaga, Málaga

来源：

JOURNAL OF APPLIED PHYCOLOGY | 1990年 / 2卷 / 04期

关键词：

DUNALIELLA-VIRIDIS; NET PHOTOSYNTHESIS; TEMPERATURE; NITROGEN CONCENTRATION;

D O I：

10.1007/BF02180920

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The photosynthetic behaviour of Dunaliella viridis has been studied under a combination of three variables: irradiance (0-900-mu-mol m-2 s-1), temperature (15, 23, 31, 38, 42-degrees-C) and nitrogen concentration (0.05, 0.5, 1.5, 5, 10 mM NO3-) at a salinity of 2 M NaCl. The highest rates of photosynthesis have been found at 31-degrees-C and a nitrate concentration of 10 mM. There exists a synergistic effect between temperature and nitrogen availability on the photosynthesis of D. viridis; under nitrogen deficiency oxygen evolution is low, even null at high temperature. The interaction between these two variables of control occurs in a multiplicative way. There is also a general increase in photosynthetic pigments following the increase in nitrogen concentration in the culture medium. The normalization of net photosynthesis data in relation to chlorophyll a shows that nitrogen concentration makes an indirect control of the photosynthetic rate of D. viridis through the variation of pigment concentration. The study of the photosynthetic parameters shows that the slope (alpha) of the curves of photosynthesis and the light-saturated photosynthesis (P(max)) are controlled by more than one variable, including temperature and nitrogen availability.

引用

页码：309 / 317

页数：9

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