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Publication
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| Title of Article |
High Temperature Alters Leaf Lipid Membrane Composition
Associated with Photochemistry of PSII and Membrane
Thermostability in Rice Seedlings |
| Date of Acceptance |
27 May 2022 |
| Journal |
| Title of Journal |
Plants |
| Standard |
OTHER (MDPI) |
| Institute of Journal |
Journal by MDPI |
| ISBN/ISSN |
2223-7747 |
| Volume |
2022 |
| Issue |
11 |
| Month |
June |
| Year of Publication |
2022 |
| Page |
1454 |
| Abstract |
: Rice cultivated in the tropics is exposed to high temperature (HT) stress which threatens its
growth and survival. This study aimed at characterizing the HT response in terms of PSII efficiency
and membrane stability, and to identify leaf fatty acid changes that may be associated with HT
tolerance or sensitivity of rice genotypes. Twenty-eight-day-old seedlings of two Thai rice cultivars
(CN1 and KDML105), a standard heat tolerance (N22), and a heat sensitive (IR64) rice genotype
were treated at 42 ◦C for 7 days. Under HT, N22 showed the highest heat tolerance displaying the
lowest increase in electrolyte leakage (EL), no increments in malondialdehyde (MDA) and stable
maximum quantum yield of PSII efficiency (Fv/Fm). Compared to KDML105 and IR64, CN1 was
more tolerant of HT, showing a lower increase in EL and MDA, and less reduction in Fv/Fm. N22
and CN1 showed a higher percentage reduction of unsaturated fatty acids (C18:2 and C18:3), which
are the major components of the thylakoid membrane, rendering the optimum thylakoid membrane
fluidity and intactness of PSII complex. Moreover, they exhibited sharp increases in long-chain fatty
acids, particularly C22:1, while the heat sensitive IR64 and KDML105 showed significant reductions.
Dramatic increases in long-chain fatty acids may lead to cuticular wax synthesis which provides
protective roles for heat tolerance. Thus, the reduction in unsaturated fatty acid composition of the
thylakoid membrane and dramatic increases in long-chain fatty acids may lead to high photosynthetic
performance and an enhanced synthesis of cuticular wax which further provided additional protective
roles for heat tolerance ability in rice |
| Keyword |
fatty acid, heat stress; rice, photosynthesis, membrane stability |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
false |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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