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Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses
The primary metabolism and respiration of the hop strobilus has not been quantified in response to daily temperature fluctuations. The objective of this study was to assess strobilus gas exchange, specifically the response to temperature fluctuations. Hop strobilus were measured under controlled env...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223736/ https://www.ncbi.nlm.nih.gov/pubmed/37653947 http://dx.doi.org/10.3390/plants12102030 |
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author | Bauerle, William L. Hazlett, Michael |
author_facet | Bauerle, William L. Hazlett, Michael |
author_sort | Bauerle, William L. |
collection | PubMed |
description | The primary metabolism and respiration of the hop strobilus has not been quantified in response to daily temperature fluctuations. The objective of this study was to assess strobilus gas exchange, specifically the response to temperature fluctuations. Hop strobilus were measured under controlled environment conditions to assess the organ’s contribution to carbon assimilation and respiration during the maturation phase. Strobilus-specific daily carbon budgets were estimated in response to temperature fluctuation. The optimal temperature for net carbon gain occurred at 15.7 °C. Estimated strobilus carbon uptake decreased approximately 41% per 5 °C increase in temperature above 20 °C. Daily temperatures within 10–27 °C resulted in a net positive strobilus daily carbon balance, whereas temperature increases beyond 27 °C increasingly exhaust strobilus carbon reserves. The Q(10) temperature coefficient (the rate respiration increases every 10 °C rise in temperature) approximately doubled per 10 °C rise in temperature from 7–40 °C (1.94–2) with slightly reduced values at lower temperatures. In conclusion, we show that photosynthetically active bracts maintain a positive strobilus carbon balance at moderate temperatures and as mean daily temperatures progressively exceed 27 °C, strobilus net carbon reserves are precipitously exhausted due to ever-increasing respiration rates. |
format | Online Article Text |
id | pubmed-10223736 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102237362023-05-28 Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses Bauerle, William L. Hazlett, Michael Plants (Basel) Brief Report The primary metabolism and respiration of the hop strobilus has not been quantified in response to daily temperature fluctuations. The objective of this study was to assess strobilus gas exchange, specifically the response to temperature fluctuations. Hop strobilus were measured under controlled environment conditions to assess the organ’s contribution to carbon assimilation and respiration during the maturation phase. Strobilus-specific daily carbon budgets were estimated in response to temperature fluctuation. The optimal temperature for net carbon gain occurred at 15.7 °C. Estimated strobilus carbon uptake decreased approximately 41% per 5 °C increase in temperature above 20 °C. Daily temperatures within 10–27 °C resulted in a net positive strobilus daily carbon balance, whereas temperature increases beyond 27 °C increasingly exhaust strobilus carbon reserves. The Q(10) temperature coefficient (the rate respiration increases every 10 °C rise in temperature) approximately doubled per 10 °C rise in temperature from 7–40 °C (1.94–2) with slightly reduced values at lower temperatures. In conclusion, we show that photosynthetically active bracts maintain a positive strobilus carbon balance at moderate temperatures and as mean daily temperatures progressively exceed 27 °C, strobilus net carbon reserves are precipitously exhausted due to ever-increasing respiration rates. MDPI 2023-05-19 /pmc/articles/PMC10223736/ /pubmed/37653947 http://dx.doi.org/10.3390/plants12102030 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Brief Report Bauerle, William L. Hazlett, Michael Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses |
title | Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses |
title_full | Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses |
title_fullStr | Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses |
title_full_unstemmed | Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses |
title_short | Humulus lupulus L. Strobilus In Situ Photosynthesis and Respiration Temperature Responses |
title_sort | humulus lupulus l. strobilus in situ photosynthesis and respiration temperature responses |
topic | Brief Report |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10223736/ https://www.ncbi.nlm.nih.gov/pubmed/37653947 http://dx.doi.org/10.3390/plants12102030 |
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