Open AccessThe physiological responses of one algae species Scenedesmus quadricauda to ammonium and alanine
Author(s) -
Xiuli Hou,
Kyeong-Soon Yang,
R Wang,
D L Rong,
Xudong Yin
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/344/1/012167
Subject(s) - ammonium , scenedesmus , nitrogen , chlorophyll , alanine , chlorophyll a , nuclear chemistry , algae , biology , botany , chemistry , biochemistry , organic chemistry , amino acid
In order to explore the role of inorganic and organic nitrogen on physiological process of Scenedesmus quadricauda , we studied the influence of two nitrogen compounds, ammonium and alanine nitrogen on growth, physiological characteristics. Chlorophyll a and maximal photochemical quantum yield of PSII (Fv/Fm), maximum electron transport rate (ETRmax) and Saturating Light intensity (I k ) were measured by Phyto-PAM under the concentration of nitrogen 0.5, 1.0, 2.0, 5.0, 10, 20, 50 mg/L. Results indicated that Chlorophyll a of Scenedesmus quadricauda was the lowest in 0.5 mg/L and 50 mg/L, and it was the highest value in 5 mg/L and 10 mg/L in ammonium nitrogen treated group. In alanine experiment group, Chlorophyll a of Scenedesmus quadricauda was raised with the increase of alanine concentration and was positive relation with alanine concentration. These results showed that ammonium ( 20 mg/L) inhibited the growth of Scenedesmus quadricauda and that alanine nitrogen is more easily for Scenedesmus quadricauda to take up. Fv/Fm, ETRmax and I k of Scenedesmus quadricauda showed different tendency between ammonium and alanine experiment group. These parameters showed higher in 5 mg/L and 10 mg/L than that of the other concentration in ammonium experiment group. In alanine experiment group, Fv/Fm, ETRmax and I k of Scenedesmus quadricauda were rising with higher alanine concentration and the fluctuation of these values of these parameters was in a small range. Scenedesmus quadricauda was sensitive to low ammonium concentration ( 20 mg/L). The higher alanine concentration promoted the growth of Scenedesmus quadricauda .