The influence of 2,4-D and dicamba on the physiology of olive seedlings
Abstract The objective of this work was to evaluate the influence of herbicides 2,4-D and dicamba on the physiological response of chlorophyll a in olive (Olea europaea) seedlings. The following eight rates of the 2,4 D (670 g a.e. ha-1) and dicamba (720 g a.e. ha-1) herbicides were applied: 0, 1.56...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Embrapa Informação Tecnológica
2024-09-01
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| Series: | Pesquisa Agropecuária Brasileira |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2024000104304&lng=en&tlng=en |
| _version_ | 1827128250396049408 |
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| author | Jaine Rubert Iuri Somavilla Eduard Leichtweiss Roberto Avila Neto Rosana Thomasi Camila Tarouco Alvaro Berghetti Fernando Nicoloso André Ulguim |
| author_facet | Jaine Rubert Iuri Somavilla Eduard Leichtweiss Roberto Avila Neto Rosana Thomasi Camila Tarouco Alvaro Berghetti Fernando Nicoloso André Ulguim |
| author_sort | Jaine Rubert |
| collection | DOAJ |
| description | Abstract The objective of this work was to evaluate the influence of herbicides 2,4-D and dicamba on the physiological response of chlorophyll a in olive (Olea europaea) seedlings. The following eight rates of the 2,4 D (670 g a.e. ha-1) and dicamba (720 g a.e. ha-1) herbicides were applied: 0, 1.56, 3.13, 6.25, 12, 25, 50, and 100% of the recommended for burndown. The herbicides were applied at 80 cm above the seedlings using a CO2 pressurized back sprayer with a 150 L ha-1 spray volume. Plant gas exchange was measured using a portable infrared gas analyzer. Chlorophyll a fluorescence was evaluated using a portable modulated light fluorometer. The application of both herbicides caused a decrease in the process of CO2 assimilation in the plants, reducing net photosynthesis and stomatal conductance. The 2,4-D herbicide caused the most severe effects on the variables related to chlorophyll a fluorescence. Low values of maximum quantic yield were observed after the application of the herbicides, of which dicamba was the most harmful. Both herbicides damage the photosynthetic apparatus of olive seedlings. |
| first_indexed | 2025-03-20T15:41:25Z |
| format | Article |
| id | doaj.art-52b51b34e07d4b879a23c89d440fba6d |
| institution | Directory Open Access Journal |
| issn | 1678-3921 |
| language | English |
| last_indexed | 2025-03-20T15:41:25Z |
| publishDate | 2024-09-01 |
| publisher | Embrapa Informação Tecnológica |
| record_format | Article |
| series | Pesquisa Agropecuária Brasileira |
| spelling | doaj.art-52b51b34e07d4b879a23c89d440fba6d2024-09-03T07:44:12ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212024-09-015910.1590/s1678-3921.pab2024.v59.03233The influence of 2,4-D and dicamba on the physiology of olive seedlingsJaine Ruberthttps://orcid.org/0000-0003-2790-7318Iuri Somavillahttps://orcid.org/0000-0001-5056-5104Eduard Leichtweisshttps://orcid.org/0000-0001-9665-8904Roberto Avila Netohttps://orcid.org/0000-0001-6003-0998Rosana Thomasihttps://orcid.org/0000-0001-9248-0213Camila Taroucohttps://orcid.org/0000-0002-9488-9773Alvaro Berghettihttps://orcid.org/0000-0001-8020-3200Fernando Nicolosohttps://orcid.org/0000-0002-7900-5263André Ulguimhttps://orcid.org/0000-0002-8850-4670Abstract The objective of this work was to evaluate the influence of herbicides 2,4-D and dicamba on the physiological response of chlorophyll a in olive (Olea europaea) seedlings. The following eight rates of the 2,4 D (670 g a.e. ha-1) and dicamba (720 g a.e. ha-1) herbicides were applied: 0, 1.56, 3.13, 6.25, 12, 25, 50, and 100% of the recommended for burndown. The herbicides were applied at 80 cm above the seedlings using a CO2 pressurized back sprayer with a 150 L ha-1 spray volume. Plant gas exchange was measured using a portable infrared gas analyzer. Chlorophyll a fluorescence was evaluated using a portable modulated light fluorometer. The application of both herbicides caused a decrease in the process of CO2 assimilation in the plants, reducing net photosynthesis and stomatal conductance. The 2,4-D herbicide caused the most severe effects on the variables related to chlorophyll a fluorescence. Low values of maximum quantic yield were observed after the application of the herbicides, of which dicamba was the most harmful. Both herbicides damage the photosynthetic apparatus of olive seedlings.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2024000104304&lng=en&tlng=enOlea europaeaconductanceherbicidenet photosynthesis |
| spellingShingle | Jaine Rubert Iuri Somavilla Eduard Leichtweiss Roberto Avila Neto Rosana Thomasi Camila Tarouco Alvaro Berghetti Fernando Nicoloso André Ulguim The influence of 2,4-D and dicamba on the physiology of olive seedlings Pesquisa Agropecuária Brasileira Olea europaea conductance herbicide net photosynthesis |
| title | The influence of 2,4-D and dicamba on the physiology of olive seedlings |
| title_full | The influence of 2,4-D and dicamba on the physiology of olive seedlings |
| title_fullStr | The influence of 2,4-D and dicamba on the physiology of olive seedlings |
| title_full_unstemmed | The influence of 2,4-D and dicamba on the physiology of olive seedlings |
| title_short | The influence of 2,4-D and dicamba on the physiology of olive seedlings |
| title_sort | influence of 2 4 d and dicamba on the physiology of olive seedlings |
| topic | Olea europaea conductance herbicide net photosynthesis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2024000104304&lng=en&tlng=en |
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