scholarly journals Membrane Glycerolipid Remodeling Triggered by Nitrogen and Phosphorus Starvation inPhaeodactylum tricornutum

2014 ◽  
Vol 167 (1) ◽  
pp. 118-136 ◽  
Author(s):  
Heni Abida ◽  
Lina-Juana Dolch ◽  
Coline Meï ◽  
Valeria Villanova ◽  
Melissa Conte ◽  
...  
Keyword(s):  
Nitrogen And Phosphorus ◽  
Phosphorus Starvation

scholarly journals Nitrogen and phosphorus co-starvation inhibits anthocyanin synthesis in the callus of grape berry skin

2019 ◽  
Author(s):  
Hui-Zhen Zheng ◽  
Huan Wei ◽  
Shui-Huan Guo ◽  
Ming-Xin Feng ◽  
Xu-Qiao Jin ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Signaling Pathway ◽  
Nitrogen Starvation ◽  
Callus Growth ◽  
Pcr Analysis ◽  
Anthocyanin Synthesis ◽  
Anthocyanin Accumulation ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Starvation ◽  
Abscisic Acid Signaling

Abstract Background: Anthocyanins are a type of natural pigment that have high potential for development and utilization in regions like food, pharmaceutical, and cosmetic industries, with nitrogen and phosphorus starvation possibly promoting their accumulation in grapes. However, it remains unclear whether such starvation impacts the grape callus, or how the co-starvation of nitrogen and phosphorus affects the biosynthesis of anthocyanins. Here, we investigated how nitrogen starvation, phosphorus starvation, and the co-starvation of these two elements affects the synthesis of anthocyanins in the callus of grape skin. We also evaluated how these parameters participate in the Abscisic acid signaling pathway. Results: Separate starvation of nitrogen and phosphorus, as well as nitrogen and phosphorus co-starvation, inhibited callus growth, while significantly promoting the accumulation of anthocyanins. However, co-starvation did not facilitate anthocyanin biosynthesis during the later stages of callus growth. qRT-PCR analysis showed that the expression of VvUFGT and VvmybA1 was closely related to anthocyanin accumulation in the callus under nitrogen and phosphorus starvation. Besides, we also confirmed that the abscisic acid signaling pathway was involved in anthocyanin accumulation as well as callus resistance under adverse conditions. Conclusions: This study demonstrated how nitrogen and phosphorus starvation contribute to the regulation of anthocyanin synthesis in the callus of grapes. This information provides a basis for investigating the regulatory mechanisms of anthocyanin synthesis in grapes, as well as theoretical support for the production of anthocyanins by callus culture. Keywords: grape; callus; anthocyanin; nitrogen starvation; phosphorus starvation; co-starvation

scholarly journals Lipid accumulation by Coelastrella multistriata (Scenedesmaceae, Sphaeropleales) during nitrogen and phosphorus starvation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yevhen Maltsev ◽  
Zinaida Krivova ◽  
Svetlana Maltseva ◽  
Kateryna Maltseva ◽  
Elena Gorshkova ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Phylogenetic Analysis ◽  
Oleic Acid ◽  
Fatty Acid ◽  
Basal Medium ◽  
The Novel ◽  
Fatty Acid Profiles ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Starvation ◽  
Long Chain

AbstractA novel freshwater strain of Coelastrella multistriata MZ–Ch23 was discovered in Tula region, Russia. The identification is based on morphological features, phylogenetic analysis of SSU rDNA gene and ITS1–5.8S rDNA–ITS2 region and predicted secondary structure of the ITS2. Phylogenetic analysis places the novel strain in the “core” Coelastrella clade within the Chlorophyceae. This is the first record of Coelastrella multistriata in the algal flora of Russia. Cultivation experiments were carried out to evaluate growth dynamics of the newly identified strain and the impact of nitrogen and/or phosphorus depletion on the fatty acid profiles and lipid productivity. On the fully supplemented Bold’s basal medium and under phosphorus-depleted conditions as well, the fatty acid profiles were dominated by α-linolenic acid (29.4–38.1% of total fatty acids). Depletion of either nitrogen or both nitrogen and phosphorus was associated with increased content of oleic acid (32.9–33.7%) and linoleic acid (11.9%). Prolongation of the growth to two months (instead of 25 days) resulted in increased content and diversity of very long-chain fatty acids including saturated species. The total very long-chain fatty acid content of 9.99% achieved in these experiments was 1.9–12.3-fold higher than in stress experiments. The highest variation was observed for oleic acid (3.4–33.7%). The novel strain showed the ability to accumulate lipids in amounts up to 639.8 mg L−1 under nitrogen and phosphorus starvation, which exceeds the previously obtained values for most Coelastrella strains. Thus, the newly identified MZ–Ch23 strain can be considered as a potential producer of omega-3 fatty acids on fully supplemented Bold’s basal medium or as a source of biomass with high content of saturated and monounsaturated fatty acids after nitrogen and phosphorus starvation.

Impacts of nitrogen and phosphorus starvation on the physiology of Chlamydomonas reinhardtii

2015 ◽  
Vol 28 (3) ◽  
pp. 1509-1520 ◽  
Author(s):  
Manoj Kamalanathan ◽  
Mattia Pierangelini ◽  
Lauren Ann Shearman ◽  
Roslyn Gleadow ◽  
John Beardall
Keyword(s):  
Chlamydomonas Reinhardtii ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Starvation
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