Enhanced β-carotene and Biomass Production by Induced Mixotrophy in Dunaliella salina across a Combined Strategy of Glycerol, Salinity, and Light

Current mixotrophic culture systems for Dunaliella salina have technical limitations to achieve high growth and productivity. The purpose of this study was to optimize the mixotrophic conditions imposed by glycerol, light, and salinity that lead to the highest biomass and β-carotene yields in D. salina. The combination of 12.5 mM glycerol, 3.0 M salinity, and 50 μmol photons m−2 s−1 light intensity enabled significant assimilation of glycerol by D. salina and consequently enhanced growth (2.1 × 106 cell mL−1) and β-carotene accumulation (4.43 pg cell−1). The saline and light shock induced the assimilation of glycerol by this microalga. At last stage of growth, the increase in light intensity (300 μmol photons m−2 s−1) caused the β-carotene to reach values higher than 30 pg cell−1 and tripled the β-carotene values obtained from photoautotrophic cultures using the same light intensity. Increasing the salt concentration from 1.5 to 3.0 M NaCl (non-isosmotic salinity) produced higher growth and microalgal β-carotene than the isosmotic salinity 3.0 M NaCl. The mixotrophic strategy developed in this work is evidenced in the metabolic capability of D. salina to use both photosynthesis and organic carbon, viz., glycerol that leads to higher biomass and β-carotene productivity than that of an either phototrophic or heterotrophic process alone. The findings provide insights into the key role of exogenous glycerol with a strategic combination of salinity and light, which evidenced unknown roles of this polyol other than that in osmoregulation, mainly on the growth, pigment accumulation, and carotenogenesis of D. salina.

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Effect of light intensity on β-carotene production and extraction by Dunaliella salina in two-phase bioreactors

Biomolecular Engineering ◽

10.1016/s1389-0344(03)00046-7 ◽

2003 ◽

Vol 20 (4-6) ◽

pp. 171-175 ◽

Cited By ~ 41

Author(s):

M Hejazi

Keyword(s):

Light Intensity ◽

Dunaliella Salina ◽

Two Phase ◽

Β Carotene ◽

Effect Of Light

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Intensive Cultivation of Dunaliella salina for Production of Biomass with Elevated β-carotene Content. Communication 1. Effect of Cultivation Factors

Hydrobiological Journal ◽

10.1615/hydrobj.v51.i3.50 ◽

2015 ◽

Vol 51 (3) ◽

pp. 69-76

Author(s):

A. V. Borovkov ◽

I. N. Gudvilovich

Keyword(s):

Dunaliella Salina ◽

Carotene Content ◽

Β Carotene

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The Job Of Microfinance For The Advancement Of Self Help Groups In India

Restaurant Business ◽

10.26643/rb.v118i8.7681 ◽

2019 ◽

Vol 118 (8) ◽

pp. 236-240

Author(s):

Dr.R. Murugesan ◽

M. Leelavathi ◽

Dr. K. Ravindran

Keyword(s):

High Growth ◽

High Growth Rate ◽

Entrepreneurial Skills ◽

Self Help ◽

The Poor ◽

Total Food ◽

Self Help Groups ◽

Positive Step ◽

Food Consumed

towards jumping from the category of developing economy to developed economy there is one big factor that stops and poses a hindrance in its path of advancement and that obstacle is termed as Poverty. The Indian economic policy focuses on a high growth rate along with a equal participation of the poor so that they avail the opportunities available in the market economy. And in order to ensure the participation of the poor it has become important for the country to create a platform where the poor can easily access the various financial products. Microfinance is one such strategy for inclusive growth. Microfinance can change the life of the poor though not completely but a reasonable change can be ensured. In different phases of life women play a crucial role despite the discrimination that is faced by them. But equality can be endowed to women by enhancing the entrepreneurial skills in them. This is possible through Self Help Groups (SHGs). In India women produce around 30% of the total food consumed but she gets only 10% of the property or wealth of the country. Development of women is inevitable for the development and growth of any economy. SHGs happen to be a positive step in this direction. Along with these mediums there should be a cheap and easy source of credit for them and Microfinance fulfills the requirement. This study aims to find the role of this strong medium of Microfinance in the advancement of SHGs in India

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Turbulent Property Rights

10.1093/oso/9780198714644.003.0006 ◽

2018 ◽

Cited By ~ 1

Author(s):

Hazel Gray

Keyword(s):

Property Rights ◽

Land Reform ◽

High Growth ◽

The State ◽

The Political ◽

Land Markets ◽

Export Agriculture ◽

Key Sectors ◽

Political Settlement

This chapter explores the role of the political settlement in shaping outcomes of land investments by analysing struggles in key sectors of the economy. Land reform during the socialist period had far-reaching implications for the political settlement. Reforms to land rights under liberalization involved strengthening land markets; however, the state continued to play a significant role. Corruption within formal land management systems became prevalent during the period of high growth. Vietnam experienced a rapid growth in export agriculture but, in contrast with stable property rights for smallholders, Tanzania’s efforts to encourage large land investments were less successful. Industrialization in both countries generated new forms of land struggles that were influenced by the different distributions of power between the state, existing landowners, and investors.

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Molecular and phylogenetic analysis reveals new diversity of Dunaliella salina from hypersaline environments

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315420001319 ◽

2021 ◽

pp. 1-11

Author(s):

Andrea Highfield ◽

Angela Ward ◽

Richard Pipe ◽

Declan C. Schroeder

Keyword(s):

Genetic Diversity ◽

Phylogenetic Analysis ◽

Dunaliella Salina ◽

Phylogenetic Analyses ◽

Ssu Rdna ◽

Lsu Rdna ◽

Hypersaline Environments ◽

Rdna Its ◽

Β Carotene ◽

Selection Of

Abstract Twelve hyper-β carotene-producing strains of algae assigned to the genus Dunaliella salina have been isolated from various hypersaline environments in Israel, South Africa, Namibia and Spain. Intron-sizing of the SSU rDNA and phylogenetic analysis of these isolates were undertaken using four commonly employed markers for genotyping, LSU rDNA, ITS, rbcL and tufA and their application to the study of Dunaliella evaluated. Novel isolates have been identified and phylogenetic analyses have shown the need for clarification on the taxonomy of Dunaliella salina. We propose the division of D. salina into four sub-clades as defined by a robust phylogeny based on the concatenation of four genes. This study further demonstrates the considerable genetic diversity within D. salina and the potential of genetic analyses for aiding in the selection of prospective economically important strains.

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Effects of various environmental factors on β-carotene production by Dunaliella salina. —note—

Journal of Fermentation and Bioengineering ◽

10.1016/0922-338x(92)90865-r ◽

1992 ◽

Vol 73 (2) ◽

pp. 178

Author(s):

Yukiho Yamaoka ◽

Osamu Takimura ◽

Hiroyuki Fuse ◽

Kazuo Kamimura ◽

Eichi Manabe ◽

...

Keyword(s):

Environmental Factors ◽

Dunaliella Salina ◽

Β Carotene

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Understanding Entrepreneurial Ecosystem

International Journal of Social Ecology and Sustainable Development ◽

10.4018/ijsesd.2019070107 ◽

2019 ◽

Vol 10 (3) ◽

pp. 103-115 ◽

Cited By ~ 2

Author(s):

Sachin A Meshram ◽

A. M. Rawani

Keyword(s):

Economic Development ◽

High Growth ◽

Knowledge Generation ◽

Business Growth ◽

Entrepreneurial Ecosystem ◽

Research Directions ◽

Entrepreneurial Ecosystems ◽

Policy Debates ◽

Small Business Growth

Entrepreneurial ecosystems are a strategy that is designed to nurture economic development by promoting entrepreneurship, small business growth, and innovation. Ecosystems represent a new direction for entrepreneurship research that simultaneously increases knowledge of the complex contextual environments surrounding the entrepreneurship process, while at the same time providing useful contributions to policy debates around the role of high-growth entrepreneurship as a driver of regional economic development. This article reviews the concept evolution; different definitions and factors of entrepreneurial ecosystems. Additionally, it provides approaches of past contributions about entrepreneurial ecosystem. This article contributes to knowledge generation and provides further research directions. This study is an attempt to cover the different articles that exist on the entrepreneurial ecosystems.

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β-Carotene production by Dunaliella salina using boron-glass powder containing iron

Journal of Fermentation and Bioengineering ◽

10.1016/s0922-338x(97)81151-8 ◽

1997 ◽

Vol 83 (6) ◽

pp. 612

Keyword(s):

Dunaliella Salina ◽

Glass Powder ◽

Β Carotene

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Born global firms’ growth and collaborative entry mode: the role of transnational entrepreneurs

International Marketing Review ◽

10.1108/imr-05-2015-0130 ◽

2017 ◽

Vol 34 (1) ◽

pp. 46-67 ◽

Cited By ~ 27

Author(s):

Yipeng Liu

Keyword(s):

Entry Mode ◽

High Growth ◽

Professional Service ◽

Service Firms ◽

Born Global ◽

Institutional Complexity ◽

Content Type ◽

Transnational Entrepreneurs ◽

Born Global Firms

Purpose The purpose of this paper is to investigate the role of transnational entrepreneurs in growing born global firms, with a focus on the growth process facilitated by collaborative entry mode. Design/methodology/approach The author chose the solar photovoltaic industry as the empirical setting. This industry is a particularly good context for the study because many firms in this industry sell knowledge-intensive products internationally from their inception. The primary data consist of 32 in-depth interviews with entrepreneurs, industry association representatives, research institute scholars, and professional service firms. Findings The study highlights the importance of transnational entrepreneurs who develop born global firms to maturity by using their technological knowledge, international connections, and bicultural advantages to navigate and leverage institutional complexity. Collaborative entry mode with distributors enables born global firms’ high growth rapidly, whereas transnational entrepreneurs play a central role in building and expanding international network. Initial public offering in overseas stock exchange accelerates the high growth trajectory of born global firm by signalling its maturity. Research limitations/implications The author took a process perspective by examining the growth and maturity of born global firms by collaborative partnership; the author’s focus on the role of transnational entrepreneurs highlighted entrepreneurs’ sensitivity to institutional complexity along the growth trajectory. Practical implications The author recommends both incumbent and entrepreneurial firms in developed economies collaborate with transnational entrepreneurs in various business areas. Industry firms may be able to cooperate on product and marketing development, and professional service firms can offer services to expand born global firms further, because transnational entrepreneurs follow the global “rules of the game”. Originality/value The author shed important light on the role of transnational entrepreneurs throughout the growth of born global firms via collaborative entry mode. Furthermore, the author develops a multilevel framework for analysing the combined influence of transnational entrepreneur and institutional complexity on the growth of born global firm.

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