Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions
Due to the weather changes prognostic for the coming years, the understanding of water deficit and physiological responses of plants to drought becomes an important requirement in order to develop technologies such as mechanisms to assist plants to cope with longer drought periods, which will be ess...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Lavras
2014-02-01
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| Series: | Ciência e Agrotecnologia |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100003&lng=en&tlng=en |
| _version_ | 1818494670483750912 |
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| author | Emanuelle Ferreira Melo Christiane Noronha Fernandes-Brum Fabrício José Pereira Evaristo Mauro de Castro Antonio Chalfun-Júnior |
| author_facet | Emanuelle Ferreira Melo Christiane Noronha Fernandes-Brum Fabrício José Pereira Evaristo Mauro de Castro Antonio Chalfun-Júnior |
| author_sort | Emanuelle Ferreira Melo |
| collection | DOAJ |
| description | Due to the weather changes prognostic for the coming years, the understanding of water deficit and physiological responses of plants to drought becomes an important requirement in order to develop technologies such as mechanisms to assist plants to cope with longer drought periods, which will be essential to maintenance of Brazilian and worldwide production. This study aimed to evaluate ecophysiological and anatomical aspects as well as the nitrate reductase activity in Siriema coffee seedlings subjected to four treatments: Daily irrigated, non-irrigated, re-irrigated 24 hours and re-irrigated 48 hours after different stress periods. Non-irrigation promoted a reduction in leaf water potential being accented from the ninth day of evaluation onwards. Re-irrigation promoted a partial recovery of the plant water potential. Non-irrigated plants showed an increase in stomatal resistance and reduction of transpiration and nitrate reductase activity. In the roots, there was a decrease in nitrate reductase activity under water stress. Leaf anatomical modifications were significant only for the adaxial surface epidermis and palisade parenchyma thickness, this latter characteristic being higher in control plants. Stomatal density and polar and equatorial diameter ratios showed the highest values in plants under water stress. In the roots, differences only in the cortex thickness being bigger in the non-irrigated treatment could be observed. Therefore, Siriema coffee plants under water stress show physiological, biochemical and anatomical modifications that contribute to the tolerance of this genotype to these conditions. |
| first_indexed | 2024-12-10T18:09:38Z |
| format | Article |
| id | doaj.art-0c5bb76790234dc9bed13eac3e5bb0de |
| institution | Directory Open Access Journal |
| issn | 1981-1829 |
| language | English |
| last_indexed | 2024-12-10T18:09:38Z |
| publishDate | 2014-02-01 |
| publisher | Universidade Federal de Lavras |
| record_format | Article |
| series | Ciência e Agrotecnologia |
| spelling | doaj.art-0c5bb76790234dc9bed13eac3e5bb0de2022-12-22T01:38:30ZengUniversidade Federal de LavrasCiência e Agrotecnologia1981-18292014-02-01381253310.1590/S1413-70542014000100003S1413-70542014000100003Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditionsEmanuelle Ferreira Melo0Christiane Noronha Fernandes-Brum1Fabrício José Pereira2Evaristo Mauro de Castro3Antonio Chalfun-Júnior4Empresa de Pesquisa Agropecuária de Minas GeraisUniversidade Federal de LavrasUniversidade Federal de LavrasUniversidade Federal de LavrasUniversidade Federal de LavrasDue to the weather changes prognostic for the coming years, the understanding of water deficit and physiological responses of plants to drought becomes an important requirement in order to develop technologies such as mechanisms to assist plants to cope with longer drought periods, which will be essential to maintenance of Brazilian and worldwide production. This study aimed to evaluate ecophysiological and anatomical aspects as well as the nitrate reductase activity in Siriema coffee seedlings subjected to four treatments: Daily irrigated, non-irrigated, re-irrigated 24 hours and re-irrigated 48 hours after different stress periods. Non-irrigation promoted a reduction in leaf water potential being accented from the ninth day of evaluation onwards. Re-irrigation promoted a partial recovery of the plant water potential. Non-irrigated plants showed an increase in stomatal resistance and reduction of transpiration and nitrate reductase activity. In the roots, there was a decrease in nitrate reductase activity under water stress. Leaf anatomical modifications were significant only for the adaxial surface epidermis and palisade parenchyma thickness, this latter characteristic being higher in control plants. Stomatal density and polar and equatorial diameter ratios showed the highest values in plants under water stress. In the roots, differences only in the cortex thickness being bigger in the non-irrigated treatment could be observed. Therefore, Siriema coffee plants under water stress show physiological, biochemical and anatomical modifications that contribute to the tolerance of this genotype to these conditions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100003&lng=en&tlng=enCafeeiroecofisiologiaestresse hídricoredutase do nitrato |
| spellingShingle | Emanuelle Ferreira Melo Christiane Noronha Fernandes-Brum Fabrício José Pereira Evaristo Mauro de Castro Antonio Chalfun-Júnior Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions Ciência e Agrotecnologia Cafeeiro ecofisiologia estresse hídrico redutase do nitrato |
| title | Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions |
| title_full | Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions |
| title_fullStr | Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions |
| title_full_unstemmed | Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions |
| title_short | Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions |
| title_sort | anatomic and physiological modifications in seedlings of coffea arabica cultivar siriema under drought conditions |
| topic | Cafeeiro ecofisiologia estresse hídrico redutase do nitrato |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000100003&lng=en&tlng=en |
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