Abstract
Abstract—We investigated the state of the pigments of inbred (zpp1225) and hybrid (zp341) maize (Zea mays L.) seeds exposed to ultraviolet radiation and α-irradiation using spectral methods. Exposure to different ultraviolet radiation doses from 5 to 13.39 kJ/m2 and α-irradiation from 1.5 to 3 kGy stimulated plant growth and seed germination. Exposure of seeds to a high dose of α-irradiation (15 kGy) led to inhibition of plant growth and development. Irradiation of seeds can change the state and function of the pigments present in the leaves. Irradiation of seeds induced conformational changes of carotenoid modules (increase of the length of the polyene chain and amount of molecules in 15-cis-conformation); the effect depends on the type of irradiation (the effect was larger when seeds were exposed to α-irradiation). It was shown that the photosynthetic apparatus in hybrid (zp341) maize is characterized by a relatively increased I–P phase on the induction curve of fast fluorescence and a higher degree of oxidation of the P700 reaction center, indicating a higher acceptor pool on the acceptor side of the photosystem I in the hybrid maize. Seed exposure to ultraviolet radiation and α-irradiation caused inhibition of reactions in photosystem II in leaves, observed as a decrease in the quantum yield of electron transport (φEo), an increase of non-photochemical quenching (DI0/RC and φDo) and a decrease of the energy of thylakoid membranes (higher Δψ). The highest decease caused by radiation was determined for the generalized index of photosystem II performance (PIABS). The PIABS production index can be recommended for assessing the status of plants in selection studies.
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Claims 13
Claim · model-written summary
Ultraviolet doses of 5 to 13.39 kJ/m2 stimulated maize growth and seed germination.
- Treatment
- ultraviolet radiation doses from 5 to 13.39 kJ/m2e0
- Outcome
- plant growth and seed germinatione0
- Direction
- stimulatede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure to different ultraviolet radiation doses from 5 to 13.39 kJ/m2 and α-irradiation from 1.5 to 3 kGy stimulated plant growth and seed germination”
t0“maize (Zea mays L.)”
Claim · model-written summary
Alpha irradiation at 1.5 to 3 kGy stimulated maize growth and seed germination.
- Treatment
- α-irradiation from 1.5 to 3 kGye0
- Outcome
- plant growth and seed germinatione0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“α-irradiation from 1.5 to 3 kGy stimulated plant growth and seed germination”
t0“maize (Zea mays L.)”
Claim · model-written summary
A 15 kGy alpha irradiation dose inhibited maize growth and development.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exposure of seeds to a high dose of α-irradiation (15 kGy) led to inhibition of plant growth and development”
t0“maize (Zea mays L.)”
Claim · model-written summary
Seed irradiation altered carotenoid conformation, increasing polyene chain length and molecules in 15-cis-conformation.
- Treatment
- Irradiation of seedse0
- Outcome
- length of the polyene chain and amount of molecules in 15-cis-conformatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irradiation of seeds induced conformational changes of carotenoid modules (increase of the length of the polyene chain and amount of molecules in 15-cis-conformation)”
t0“maize (Zea mays L.)”
Claim · model-written summary
Alpha irradiation produced a larger carotenoid conformational effect than ultraviolet irradiation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect was larger when seeds were exposed to α-irradiation”
t0“maize (Zea mays L.)”
e1“ultraviolet radiation doses from 5 to 13.39 kJ/m2”
Claim · model-written summary
Hybrid zp341 maize had a relatively increased I–P phase on the fast fluorescence induction curve.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the photosynthetic apparatus in hybrid (zp341) maize is characterized by a relatively increased I–P phase on the induction curve of fast fluorescence”
Claim · model-written summary
Hybrid zp341 maize had a higher degree of P700 reaction center oxidation.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hybrid (zp341) maize is characterized by a relatively increased I–P phase on the induction curve of fast fluorescence and a higher degree of oxidation of the P700 reaction center”
Claim · model-written summary
The hybrid maize had a higher acceptor pool on the acceptor side of photosystem I.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indicating a higher acceptor pool on the acceptor side of the photosystem I in the hybrid maize”
Claim · model-written summary
Seed irradiation decreased quantum yield of electron transport in maize leaves.
- Organ / stage
- leavese0
- Treatment
- ultraviolet radiation and α-irradiatione0
- Outcome
- quantum yield of electron transport (φEo)e0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed exposure to ultraviolet radiation and α-irradiation caused inhibition of reactions in photosystem II in leaves, observed as a decrease in the quantum yield of electron transport (φEo)”
t0“maize (Zea mays L.)”
Claim · model-written summary
Seed irradiation increased non-photochemical quenching in maize leaves.
- Organ / stage
- leavese0
- Treatment
- ultraviolet radiation and α-irradiatione0
- Outcome
- non-photochemical quenching (DI0/RC and φDo)e0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed exposure to ultraviolet radiation and α-irradiation caused inhibition of reactions in photosystem II in leaves, observed as a decrease in the quantum yield of electron transport (φEo), an increase of non-photochemical quenching (DI0/RC and φDo)”
t0“maize (Zea mays L.)”
Claim · model-written summary
Seed irradiation decreased thylakoid membrane energy in maize leaves.
- Organ / stage
- leavese0
- Treatment
- ultraviolet radiation and α-irradiatione0
- Outcome
- energy of thylakoid membranese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed exposure to ultraviolet radiation and α-irradiation caused inhibition of reactions in photosystem II in leaves, observed as a decrease in the quantum yield of electron transport (φEo), an increase of non-photochemical quenching (DI0/RC and φDo) and a decrease of the energy of thylakoid membranes (higher Δψ)”
t0“maize (Zea mays L.)”
Claim · model-written summary
The greatest radiation-associated decrease was in the generalized photosystem II performance index.
- Treatment
- radiatione0
- Outcome
- generalized index of photosystem II performance (PIABS)e0
- Direction
- deceasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest decease caused by radiation was determined for the generalized index of photosystem II performance (PIABS)”
t0“maize (Zea mays L.)”
Claim · model-written summary
The authors recommend PIABS for assessing plant status in selection studies.
- Outcome
- PIABS production index can be recommended for assessing the status of plants in selection studiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The PIABS production index can be recommended for assessing the status of plants in selection studies”
t0“maize (Zea mays L.)”
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