Action of an algicide from a cyanobacterium, Oscillatoria laetevirens, on photosystem II.
Indian J Exp Biol
;
2001 Dec; 39(12): 1268-73
Article
Dans Anglais
| IMSEAR
| ID: sea-57662
ABSTRACT
Oscillatoria laetevirens produces an algicide, named oscillatorin (OS), which inhibits growth of higher plants. Effect of purified oscillatorin and some 'urea-triazine type' herbicides was studied on photosystem II activity and composition of pigment protein complex in spinach thylakoid membrane. For oscillatorin the I50 at 10 microg chlorophyll concentration, inhibitor constant (Ki), specific binding sites and Hill coefficient were calculated to be 1.45, 0.15, 2.3 and 0.2 microM respectively. Metribuzin and oscillatorin affected towards the donor side and brought about identical changes in polypeptide composition of PSII complex. Further, metribuzin and atrazine exerted antagonistic and synergistic responses on oscillatorin action. Some of these parameters were also studied on weed plants to assess upon the weedicidal potential of oscillatorin.
Texte intégral:
Disponible
Indice:
IMSEAR (Asie du Sud-Est)
Sujet Principal:
Composés chimiques organiques
/
Cyanobactéries
/
Complexe protéique du centre réactionnel de la photosynthèse
/
Complexes collecteurs de lumière
/
Complexe protéique du photosystème II
/
Électrophorèse sur gel de polyacrylamide
/
Herbicides
langue:
Anglais
Texte intégral:
Indian J Exp Biol
Année:
2001
Type:
Article
Documents relatifs à ce sujet
MEDLINE
...
LILACS
LIS