Figure 5 - uploaded by Maryam Rezayian
Content may be subject to copyright.
Chlorophyll and carotenoid contents in Synechococcus elongatus subjected to various salt concentrations. Values marked with different letters are significantly different according to Duncan at P < 0.05.
Similar publications
The whole genome of Synechococcus moorigangaii CMS01 isolated from Indian Sundarbans mangroves of Bay of Bengal is about 5.5 Mbp in size and contains approximately 0.5 Mbp plasmids. Genome annotation revealed total of 5806 genes out of which 5701 were CDSs. Of these, 5616 coding genes with 5616 protein coding CDSs were found. Along with genes codin...
Citations
... Under suboptimal growth conditions (very low or very high), Chl tend to decreasein many cases reflecting biomass reduction. High osmotic pressure (i.e., NaCl concentration) reinforces the influence upon Chl accumulation in biomass (Ayachi et al. 2007;Rezayian and Faramarzi 2017;Singh and Mishra 2018). Synechocystis sp. ...
... Plankton cell development, physiology, and cell division are all affected by salinity stress. Even though smaller plankton displayed a variety of adaptation strategies to prevent salt stress, their tolerance limits varied depending on the strain (Bemal and Anil, 2018;Rezayian et al., 2017). Rezayian et al. (2017) and Kumar et al. (2021) pointed out that the smaller variations of the salinity also significantly affect the growth and production of smaller plankton. ...
... Even though smaller plankton displayed a variety of adaptation strategies to prevent salt stress, their tolerance limits varied depending on the strain (Bemal and Anil, 2018;Rezayian et al., 2017). Rezayian et al. (2017) and Kumar et al. (2021) pointed out that the smaller variations of the salinity also significantly affect the growth and production of smaller plankton. Also, there are some studies available on various plankton components of the KBW (Jyothibabu et al., 2006;Madhu et al., 2007;Haridevan et al., 2015;Arya et al., 2016;Anjusha et al., 2018;Arunpandi et al., 2020aArunpandi et al., , b, 2021a. ...
... The total APP abundance in the current study was found to be higher during the PRM as compared to the SWM (Fig. 6b). The slight differences in the salinity also make a significant effect on the growth and production of smaller plankton in the system (Rezayian et al., 2017;Kumar et al., 2021). During the PRM, Synechococcus (SYN I) abundance was higher in the polyhaline condition (Fig. 7a). ...
This study examines how a large saltwater barrage [Thannermukkom barrage (TB)] in the Kochi backwaters (KBW), India's largest estuarine system on the west coast, affects the distribution of autotrophic small plankton communities (Synechococcus, picoeukaryotes, and nanoplankton). The KBW has two distinct regions when the shutters of TB are closed during non-monsoon periods: a mesohaline to euhaline northern region downstream and a limnetic southern region upstream. The current seasonal salinity distribution in the KBW revealed a significant decrease compared to that before the establishment of TB. Considering this, we hypothesised that the human-induced hydrographical transformation associated with the functioning of TB has implications for the ecology of the smaller plankton components in the system, and to test this, smaller autotrophic plankton and hydrographical variables were collected from the KBW during three different seasons, including the Pre-Monsoon [(PRM) March-May], the Southwest Monsoon (SWM) from June to September, and the Northeast Monsoon (NEM) from November to February. Seasonally, 13 locations along the KBW were sampled, with locations 1-4 in the downstream, 5-9 in the midstream, and 10-13 in the upstream. The findings revealed that, regardless of season, a mesohaline condition in the KBW is the most conducive one that sustains an increased abundance of autotrophic pico-and nano-plankton communities. Two strains of Synechococcus (SYN) [phycoerythrin rich SYN I and phycocyanin rich SYN II] contribute nearly equally in the mesohaline region, whereas a predominance of SYN II (>90%) was found in oligohaline/limnohaline conditions. We show that TB reduces the geographic extent of the mesohaline zone in the KBW that is most conducive to maintaining a high abundance of smaller plankton communities, reducing the total abundance and biomass of the smaller plankton community in the system.
