Temperature sensitivity of photosystem II in isolated thylakoid membranes from fluridone-treated pea leaves

Kolyo DANKOV; Georgi RASHKOV; Amarendra MISRA; Emilia L. APOSTOLOVA

Makale detayları

Temperature sensitivity of photosystem II in isolated thylakoid membranes from fluridone-treated pea leaves

Yazarlar:

Kolyo DANKOV | Georgi RASHKOV | Amarendra MISRA | Emilia L. APOSTOLOVA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Botany 2015 Vol.39 Issue 3, pp.420-428

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000815779

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X

Anahtar kelimeler:

Özet:

 

High temperature-induced changes in the photosystem II (PSII) activity of thylakoid membranes isolated from pea (Pisum sativum L. 'Ran') plants treated with low (10-8 M) and high (10-7 M) concentrations of fluridone were investigated. Pulse amplitude modulated (PAM) chlorophyll fluorescence and photosynthetic oxygen evolution (measured by polarographic oxygen rate electrode) were used to estimate the effect of high temperature on the functional activity of PSII. Higher temperature treatments lead to stronger inhibition of the flash oxygen evolution than the primary photochemistry of PSII (Fv/Fm). The inhibitory effect of higher temperature on the PSII? centers is stronger than on the PSIIÃ centers. The heat-induced damage in the PSIIαα\alpha centers as well as in the donor side of all PSII centers (PSIIαα\alpha and PSIIÃ) is accentuated by fluridone.

 

High temperature-induced changes in the photosystem II (PSII) activity of thylakoid membranes isolated from pea (Pisum sativum L. 'Ran') plants treated with low (10-8 M) and high (10-7 M) concentrations of fluridone were investigated. Pulse amplitude modulated (PAM) chlorophyll fluorescence and photosynthetic oxygen evolution (measured by polarographic oxygen rate electrode) were used to estimate the effect of high temperature on the functional activity of PSII. Higher temperature treatments lead to stronger inhibition of the flash oxygen evolution than the primary photochemistry of PSII (Fv/Fm). The inhibitory effect of higher temperature on the PSII? centers is stronger than on the PSIIÃ centers. The heat-induced damage in the PSIIαα\alpha centers as well as in the donor side of all PSII centers (PSIIαα\alpha and PSIIÃ) is accentuated by fluridone.

Makale detayları

Temperature sensitivity of photosystem II in isolated thylakoid membranes from fluridone-treated pea leaves

Yazarlar:

Kolyo DANKOV | Georgi RASHKOV | Amarendra MISRA | Emilia L. APOSTOLOVA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Botany 2015 Vol.39 Issue 3, pp.420-428

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000815779

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X

Fluridone

PAM chlorophyll fluorescence

photosynthetic oxygen evolution

PSII? centers

PSIIÃ centers

carotenoids

Sayı

Makale detayları

Temperature sensitivity of photosystem II in isolated thylakoid membranes from fluridone-treated pea leaves

Yazarlar: Kolyo DANKOV | Georgi RASHKOV | Amarendra MISRA | Emilia L. APOSTOLOVA

Yayıncı: TUBITAK

Dergi: Turkish Journal of Botany 2015 Vol.39 Issue 3, pp.420-428

Belge Tipi: Makale

Yayın Tarihi: 8/2015

Belge Dili: Türkçe

Document ID (Org No.): 2000815779

Sıklık: İki Aylık

eISSN: 1303-6106

pISSN: 1300-008X

Fluridone

PAM chlorophyll fluorescence

photosynthetic oxygen evolution

PSII? centers

PSIIÃ centers

carotenoids

Sayı

Yazarlar:

Kolyo DANKOV | Georgi RASHKOV | Amarendra MISRA | Emilia L. APOSTOLOVA

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Botany 2015 Vol.39 Issue 3, pp.420-428

Belge Tipi:

Makale

Yayın Tarihi:

8/2015

Belge Dili:

Türkçe

Document ID (Org No.):

2000815779

Sıklık:

İki Aylık

eISSN:

1303-6106

pISSN:

1300-008X

PSIIÃ centers