Photosystem II Is More Sensitive than Photosystem I to Al3+ Induced Phytotoxicity
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Photosystem II Is More Sensitive than Photosystem I to Al3+ Induced Phytotoxicity. / Moustaka, Julietta; Ouzounidou, Georgia; Sperdouli, Ilektra; Moustakas, Michael.
I: Materials Transactions, Bind 11, Nr. 9, 1772, 2018, s. 1-13.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Photosystem II Is More Sensitive than Photosystem I to Al3+ Induced Phytotoxicity
AU - Moustaka, Julietta
AU - Ouzounidou, Georgia
AU - Sperdouli, Ilektra
AU - Moustakas, Michael
PY - 2018
Y1 - 2018
N2 - Aluminium (Al) the most abundant metal in the earth's crust is toxic in acid soils (pH < 5.5) mainly in the ionic form of Al 3+ species. The ability of crops to overcome Al toxicity varies among crop species and cultivars. Here, we report for a first time the simultaneous responses of photosystem II (PSII) and photosystem I (PSI) to Al 3+ phytotoxicity. The responses of PSII and PSI in the durum wheat ( Triticum turgidum L. cv. 'Appulo E') and the triticale (X Triticosecale Witmark cv. 'Dada') were evaluated by chlorophyll fluorescence quenching analysis and reflection spectroscopy respectively, under control (-Al, pH 6.5) and 148 μM Al (+Al, pH 4.5) conditions. During control growth conditions the high activity of PSII in 'Appulo E' led to a rather higher electron flow to PSI, which induced a higher PSI excitation pressure in 'Appulo E' than in 'Dada' that presented a lower PSII activity. However, under 148 μM Al the triticale 'Dada' presented a lower PSII and PSI excitation pressure than 'Appulo E'. In conclusion, both photosystems of 'Dada' displayed a superior performance than 'Appulo E' under Al exposure, while in both cultivars PSII was more affected than PSI from Al 3+ phytotoxicity.
AB - Aluminium (Al) the most abundant metal in the earth's crust is toxic in acid soils (pH < 5.5) mainly in the ionic form of Al 3+ species. The ability of crops to overcome Al toxicity varies among crop species and cultivars. Here, we report for a first time the simultaneous responses of photosystem II (PSII) and photosystem I (PSI) to Al 3+ phytotoxicity. The responses of PSII and PSI in the durum wheat ( Triticum turgidum L. cv. 'Appulo E') and the triticale (X Triticosecale Witmark cv. 'Dada') were evaluated by chlorophyll fluorescence quenching analysis and reflection spectroscopy respectively, under control (-Al, pH 6.5) and 148 μM Al (+Al, pH 4.5) conditions. During control growth conditions the high activity of PSII in 'Appulo E' led to a rather higher electron flow to PSI, which induced a higher PSI excitation pressure in 'Appulo E' than in 'Dada' that presented a lower PSII activity. However, under 148 μM Al the triticale 'Dada' presented a lower PSII and PSI excitation pressure than 'Appulo E'. In conclusion, both photosystems of 'Dada' displayed a superior performance than 'Appulo E' under Al exposure, while in both cultivars PSII was more affected than PSI from Al 3+ phytotoxicity.
KW - aluminium
KW - chlorophyll fluorescence
KW - durum wheat
KW - excitation pressure
KW - non-photochemical quenching
KW - photosynthesis
KW - photoprotection
KW - photoinhibition
KW - reactive oxygen species
KW - triticale
KW - Reactive oxygen species
KW - Non-photochemical quenching
KW - Triticale
KW - Aluminium
KW - Chlorophyll fluorescence
KW - Durum wheat
KW - Excitation pressure
KW - Photoinhibition
KW - Photosynthesis
KW - Photoprotection
U2 - 10.3390/ma11091772
DO - 10.3390/ma11091772
M3 - Journal article
C2 - 30235794
VL - 11
SP - 1
EP - 13
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 9
M1 - 1772
ER -
ID: 204467744