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Cited by 62Photosynthetic Processes and MechanismsAlgal biology and biofuel productionPlant Stress Responses and Tolerance

RESPONSE TO SALINITY AND HEAT STRESS IN TWO HALOTOLERANT CHLOROPHYTE ALGAE1

Henley, William J., Major, Kelly M., Hironaka, Janice L.·2002·Journal of Phycology
DOI 10.1046/j.1529-8817.2002.01172.x
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Abstract

Two new isolates of halotolerant chlorophyte algae from the Salt Plains National Wildlife Refuge in Oklahoma, USA, tentatively identified as Dunaliella sp. Teodoresco and Nannochloris sp. Naumann, were characterized with respect to interaction between growth salinity and short‐term heat tolerance. Cells were cultured at 23–25° C over a wide range of salinity. In both species, salinity alone had little effect on maximum photochemical yield (measured by pulse modulated fluorescence) and integrity of the light harvesting system (77 K fluorescence emission spectra). In contrast, Nannochloris exhibited decreasing growth rate (μ), light‐saturated photosynthetic capacity (Pcellmax), respiration (Rd), light‐harvesting efficiency (αcell), and chl content with increasing salinity. Cultures were heated for 2 h near their upper temperature limits (41.5° C for Dunaliella and 45° C for Nannochloris grown at 50 psu). Dunaliella was progressively more heat‐tolerant with increasing salinity. Photochemical yield of cells at 100 and 50 psu was inhibited by about 15% and 40%, respectively, and largely recovered within 30 min after return to 23° C. Thermal inhibition of photochemical yield in Nannochloris was about 45% at both 50 and 100 psu, but recovery was slower at 100 psu. At 20 psu, both species were almost 90% inhibited by high temperature and required more than a day to recover. In both species, 2 h of heating increased the PSI:PSII fluorescence emission ratio (714:690 nm) at all salinities. This ratio largely recovered within 24 h in Dunaliella at 50 and 100 psu and partially recovered in Nannochloris at 100 psu, but cells of both species heated at 20 psu were chlorotic the next day.

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Crossref · 10.1046/j.1529-8817.2002.01172.x

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  • High light intensity, high salinity, extreme temperatures, and nutrient supplements enhance β-carotene production.

    “The high light intensity, high salinity, extreme temperatures, and nutrient supplements are playing a significant role in enhancing β-carotene production (Henley et al., 2002, Raja et al., 2004).”

    From Microalgae Metabolites: A Rich Source for Food and Medicine (2019) · cites this paper as Henley et al., 2002

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Authors
Henley, W. J., Major, K. M., & Hironaka, J. L.
Affiliations
Oklahoma State University (US)
Corresponding author
Henley, William J.
ORCID
Henley, William J.
Venue
Journal of Phycology
Publisher
Wiley
Published
2002-08
Volume
38
Issue
4
Pages
757-766
ISSN
  • 0022-3646 (ISSN-L)
  • 1529-8817
DOI
10.1046/j.1529-8817.2002.01172.x
OpenAlex
W1973280207
Cited by
62
References
42
Citations by year
2026: 2 · 2025: 4 · 2024: 6 · 2022: 1 · 2021: 1 · 2020: 4 · 2019: 4 · 2018: 2 · 2017: 3 · 2016: 3 · 2015: 1 · 2014: 6 · 2013: 5 · 2012: 4
FWCI
0.46
Type
journal article
Language
en
Open access
closed
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 15 d)
Locations
Journal of Phycology (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Photosynthetic Processes and Mechanisms
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Algal biology and biofuel production
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Stress Responses and Tolerance
Keywords
halotolerant algae, Dunaliella, Nannochloris, salt stress, heat stress, heat tolerance, photosynthetic yield, light-harvesting complexes, chlorophyll fluorescence, photosynthetic capacity, respiration, growth rate, thermal recovery

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