Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes
For agricultural soils with low natural fertility, the possibility of using rock powders as an alternative source of nutrients and/or improver of soil physical parameters is under discussion and study. Shungite rocks, carbon-bearing volcanic sedimentary rock, are characterized by a high content of c...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-06-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/11/7/1302 |
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| author | Elena Ikkonen Svetlana Chazhengina Olga Bakhmet Valeria Sidorova |
| author_facet | Elena Ikkonen Svetlana Chazhengina Olga Bakhmet Valeria Sidorova |
| author_sort | Elena Ikkonen |
| collection | DOAJ |
| description | For agricultural soils with low natural fertility, the possibility of using rock powders as an alternative source of nutrients and/or improver of soil physical parameters is under discussion and study. Shungite rocks, carbon-bearing volcanic sedimentary rock, are characterized by a high content of carbon and nutrients. This study aimed to evaluate whether shungite application to Umbric Podzols may affect leaf and root mitochondrial respiratory pathways, and the leaf response to temperature change. A pot culture experiment was conducted with <i>Allium cepa</i> L. seedlings, using soil shungite concentrations of 0, 5, 10, and 20 g kg<sup>−1</sup> and two soil water regimes: well-watered (WW) and drying-wetting (DW) cycles. Soil water deficit increased total respiration (<i>V</i><sub>t</sub>) of onion leaves, but not roots, under low (13 °C) and high (33 °C) measurement temperature. Shungite application affected leaf <i>V</i><sub>t</sub> only at 13 °C: it increased the <i>V</i><sub>t</sub> rate under WW and decreased one under DW. An increase in the measurement temperature to 33 °C enhanced the sensitivity of leaf respiration to the inhibitor of the alternative respiratory pathway (salicylhydroxamic acid, SHAM). Shungite application increased the contribution of SHAM-sensitive pathway to the leaf <i>V</i><sub>t</sub> rate under WW, but not under the DW regime, regardless of the leaf temperature. In contrast to the SHAM-resistant pathway, the temperature sensitivity of the SHAM-sensitive rate decreased following the decrease in soil water availability. Shungite application increased the temperature sensitivity of both SHAM-sensitive and SHAM-resistant pathways under DW, and significantly decreased these parameters under WW. In summary, the decrease in temperature sensitivity of alternative SHAM-sensitive respiratory pathway with a decrease of soil water availability or shungite-related decrease of both SHAM-sensitive and SHAM-resistant leaf respiration may play an important role in enhancing the resistance of plant respiration to stress temperature. |
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| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-09T04:52:23Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
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| series | Agronomy |
| spelling | doaj.art-db21a7589c6a4540b2f879475b533f9a2023-12-03T13:09:39ZengMDPI AGAgronomy2073-43952021-06-01117130210.3390/agronomy11071302Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water RegimesElena Ikkonen0Svetlana Chazhengina1Olga Bakhmet2Valeria Sidorova3Karelian Research Center RAS, Institute of Biology, Puskinskaja, 11, 185610 Petrozavodsk, RussiaKarelian Research Center RAS, Institute of Geology, Puskinskaja, 11, 185610 Petrozavodsk, RussiaKarelian Research Center RAS, Puskinskaja, 11, 185610 Petrozavodsk, RussiaKarelian Research Center RAS, Institute of Biology, Puskinskaja, 11, 185610 Petrozavodsk, RussiaFor agricultural soils with low natural fertility, the possibility of using rock powders as an alternative source of nutrients and/or improver of soil physical parameters is under discussion and study. Shungite rocks, carbon-bearing volcanic sedimentary rock, are characterized by a high content of carbon and nutrients. This study aimed to evaluate whether shungite application to Umbric Podzols may affect leaf and root mitochondrial respiratory pathways, and the leaf response to temperature change. A pot culture experiment was conducted with <i>Allium cepa</i> L. seedlings, using soil shungite concentrations of 0, 5, 10, and 20 g kg<sup>−1</sup> and two soil water regimes: well-watered (WW) and drying-wetting (DW) cycles. Soil water deficit increased total respiration (<i>V</i><sub>t</sub>) of onion leaves, but not roots, under low (13 °C) and high (33 °C) measurement temperature. Shungite application affected leaf <i>V</i><sub>t</sub> only at 13 °C: it increased the <i>V</i><sub>t</sub> rate under WW and decreased one under DW. An increase in the measurement temperature to 33 °C enhanced the sensitivity of leaf respiration to the inhibitor of the alternative respiratory pathway (salicylhydroxamic acid, SHAM). Shungite application increased the contribution of SHAM-sensitive pathway to the leaf <i>V</i><sub>t</sub> rate under WW, but not under the DW regime, regardless of the leaf temperature. In contrast to the SHAM-resistant pathway, the temperature sensitivity of the SHAM-sensitive rate decreased following the decrease in soil water availability. Shungite application increased the temperature sensitivity of both SHAM-sensitive and SHAM-resistant pathways under DW, and significantly decreased these parameters under WW. In summary, the decrease in temperature sensitivity of alternative SHAM-sensitive respiratory pathway with a decrease of soil water availability or shungite-related decrease of both SHAM-sensitive and SHAM-resistant leaf respiration may play an important role in enhancing the resistance of plant respiration to stress temperature.https://www.mdpi.com/2073-4395/11/7/1302onionrock powderrespiratory pathwayssoil water deficit |
| spellingShingle | Elena Ikkonen Svetlana Chazhengina Olga Bakhmet Valeria Sidorova Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes Agronomy onion rock powder respiratory pathways soil water deficit |
| title | Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes |
| title_full | Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes |
| title_fullStr | Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes |
| title_full_unstemmed | Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes |
| title_short | Effect of Shungite Application on the Temperature Sensitivity of <i>Allium cepa</i> Respiration under Two Soil Water Regimes |
| title_sort | effect of shungite application on the temperature sensitivity of i allium cepa i respiration under two soil water regimes |
| topic | onion rock powder respiratory pathways soil water deficit |
| url | https://www.mdpi.com/2073-4395/11/7/1302 |
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