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Article

Differentiation of the High Night Temperature Response in Leaf Segments of Rice Cultivars with Contrasting Tolerance

Max-Planck-Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany
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Author to whom correspondence should be addressed.
Equal contribution.
Academic Editors: Roberto Papa, Emidio Albertini and Valerio Di Vittori
Int. J. Mol. Sci. 2021, 22(19), 10451; https://doi.org/10.3390/ijms221910451
Received: 20 August 2021 / Revised: 15 September 2021 / Accepted: 23 September 2021 / Published: 28 September 2021
(This article belongs to the Special Issue Molecular Analysis of Crop Diversity)
High night temperatures (HNT) affect rice yield in the field and induce chlorosis symptoms in leaves in controlled chamber experiments. However, little is known about molecular changes in leaf segments under these conditions. Transcript and metabolite profiling were performed for leaf segments of six rice cultivars with different HNT sensitivity. The metabolite profile of the sheath revealed a lower metabolite abundance compared to segments of the leaf blade. Furthermore, pre-adaptation to stress under control conditions was detected in the sheath, whereas this segment was only slightly affected by HNT. No unique significant transcriptomic changes were observed in the leaf base, including the basal growth zone at HNT conditions. Instead, selected metabolites showed correlations with HNT sensitivity in the base. The middle part and the tip were most highly affected by HNT in sensitive cultivars on the transcriptomic level with higher expression of jasmonic acid signaling related genes, genes encoding enzymes involved in flavonoid metabolism and a gene encoding galactinol synthase. In addition, gene expression of expansins known to improve stress tolerance increased in tolerant and sensitive cultivars. The investigation of the different leaf segments indicated highly segment specific responses to HNT. Molecular key players for HNT sensitivity were identified. View Full-Text
Keywords: high night temperature; rice cultivars; leaf segments; sheath; metabolomics; RNA-Seq high night temperature; rice cultivars; leaf segments; sheath; metabolomics; RNA-Seq
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MDPI and ACS Style

Schaarschmidt, S.; Glaubitz, U.; Erban, A.; Kopka, J.; Zuther, E. Differentiation of the High Night Temperature Response in Leaf Segments of Rice Cultivars with Contrasting Tolerance. Int. J. Mol. Sci. 2021, 22, 10451. https://doi.org/10.3390/ijms221910451

AMA Style

Schaarschmidt S, Glaubitz U, Erban A, Kopka J, Zuther E. Differentiation of the High Night Temperature Response in Leaf Segments of Rice Cultivars with Contrasting Tolerance. International Journal of Molecular Sciences. 2021; 22(19):10451. https://doi.org/10.3390/ijms221910451

Chicago/Turabian Style

Schaarschmidt, Stephanie, Ulrike Glaubitz, Alexander Erban, Joachim Kopka, and Ellen Zuther. 2021. "Differentiation of the High Night Temperature Response in Leaf Segments of Rice Cultivars with Contrasting Tolerance" International Journal of Molecular Sciences 22, no. 19: 10451. https://doi.org/10.3390/ijms221910451

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