[Volume fraction of gas vesicle and floating characteristics of cyanobacteria in Taihu Lake under different pressures].
Huan Jing Ke Xue
; 35(8): 2974-9, 2014 Aug.
Article
de Zh
| MEDLINE
| ID: mdl-25338368
ABSTRACT
In order to ascertain the volumetric change of gas vesicles in cyanobacteria and the floating characteristics, capillary pressure method and image analysis method were used to study burst situation and remanent volume fraction of gas vesicles in cyanobacteria under different pressures. The reform situation after pressuring was also analyzed in this research. The results showed that the volume fraction of gas vesicles in Taihu Lake were 29.52%, 5.73%, 4.43%, 2.71%, 2.46%, 2.19% under 0 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa, 0.6 MPa, 0.7 MPa determined by the image analysis, and were 10.93%, 1.14%, 0.90%, 0.27%, 0.14%, 0.04% determined by the capillary pressure method; cyanobacteria sank due to the gas vesicles' bursting when the pressure was greater than 0.4 MPa. Gas vesicles and structure after pressure were reformed with the lapse of time, under 1 000 lx, 25 degrees C, after 8 h, 24 h, 48 h, the reformed gas vesicles accounted for 31.02%, 45.68%, 81.05% of total gas vesicles before pressuring. Image analysis method is more accurate in the determination for cyanobacteria gas vesicles' volume, while the volume is smaller measured by traditional capillary pressure method.
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Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Vacuoles
/
Lacs
/
Cyanobactéries
Pays/Région comme sujet:
Asia
Langue:
Zh
Journal:
Huan Jing Ke Xue
Année:
2014
Type de document:
Article