Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization
Cashew cultivation is an activity of great socioeconomic relevance, especially for agriculture in the semi-arid region of Northeast Brazil, standing out as an option to generate jobs and income. Thus, the present study aimed to evaluate the photosynthetic pigments and photochemical efficiency of pre...
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| Format: | Article |
| Language: | English |
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AIMS Press
2019-10-01
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| Series: | AIMS Agriculture and Food |
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| Online Access: | https://www.aimspress.com/article/10.3934/agrfood.2019.4.1007/fulltext.html |
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| author | Geovani S. de Lima Vicente Elias da S. Neto Hans R. Gheyi Reginaldo G. Nobre Genilson L. Diniz Lauriane A. dos Anjos Soares Pedro D. Fernandes Fernandes A. de Almeida Francisco Wesley A. Pinheiro |
| author_facet | Geovani S. de Lima Vicente Elias da S. Neto Hans R. Gheyi Reginaldo G. Nobre Genilson L. Diniz Lauriane A. dos Anjos Soares Pedro D. Fernandes Fernandes A. de Almeida Francisco Wesley A. Pinheiro |
| author_sort | Geovani S. de Lima |
| collection | DOAJ |
| description | Cashew cultivation is an activity of great socioeconomic relevance, especially for agriculture in the semi-arid region of Northeast Brazil, standing out as an option to generate jobs and income. Thus, the present study aimed to evaluate the photosynthetic pigments and photochemical efficiency of precocious dwarf cashew under salt stress and potassium fertilization. The study was conducted using a Regolithic Neosol with sandy loam texture, adopting a randomized block design in 5×2 factorial arrangement, which corresponded to five levels of electrical conductivity of irrigation water—ECw (0.4; 1.2; 2.0; 2.8 and 3.6 dS m<sup>-1</sup>) associated with two doses of potassium fertilization—KD (100 and 150% of recommendation), with three replicates and two plants per plot. Increasing water salinity inhibited chlorophyll synthesis and decreased electron transport rate and quantum yield of non-regulated energy dissipation in precocious dwarf cashew, at 50 days after sowing. There was significant interaction for chlorophyll <em>a</em> and <em>b</em> contents and the effects of salt stress were intensified by potassium doses on the chlorophyll <em>b</em> content of precocious dwarf cashew. Potassium doses of 100 and 150% of recommendation (150 and 225 mg K<sub>2</sub>O kg<sup>-1</sup> of soil) do not mitigate the effect of salt stress on photosynthetic pigment synthesis and photochemical efficiency of cashew plants in the rootstock formation phase. |
| first_indexed | 2024-12-11T20:49:07Z |
| format | Article |
| id | doaj.art-7f31b51e739b49719e85129244d1ac86 |
| institution | Directory Open Access Journal |
| issn | 2471-2086 |
| language | English |
| last_indexed | 2024-12-11T20:49:07Z |
| publishDate | 2019-10-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Agriculture and Food |
| spelling | doaj.art-7f31b51e739b49719e85129244d1ac862022-12-22T00:51:16ZengAIMS PressAIMS Agriculture and Food2471-20862019-10-01441007101910.3934/agrfood.2019.4.1007Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilizationGeovani S. de Lima0Vicente Elias da S. Neto1Hans R. Gheyi2Reginaldo G. Nobre3Genilson L. Diniz4Lauriane A. dos Anjos Soares5Pedro D. Fernandes6Fernandes A. de Almeida7Francisco Wesley A. Pinheiro81 Academic Unit of Agricultural Sciences, Center of Agrifood Science and Technology, Universidade Federal de Campina Grande, Pombal, PB, Brazil1 Academic Unit of Agricultural Sciences, Center of Agrifood Science and Technology, Universidade Federal de Campina Grande, Pombal, PB, Brazil2 Nucleus of Soil and Water Engineering, Universidade Federal do Recôncavo da Bahia, Cruz das Almas, BA, Brazil3 Department of Science and Technology, Universidade Federal Rural do Semi-Árido, Caraúbas, RN, Brazil.1 Academic Unit of Agricultural Sciences, Center of Agrifood Science and Technology, Universidade Federal de Campina Grande, Pombal, PB, Brazil1 Academic Unit of Agricultural Sciences, Center of Agrifood Science and Technology, Universidade Federal de Campina Grande, Pombal, PB, Brazil4 Center of Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil1 Academic Unit of Agricultural Sciences, Center of Agrifood Science and Technology, Universidade Federal de Campina Grande, Pombal, PB, Brazil4 Center of Technology and Natural Resources, Universidade Federal de Campina Grande, Campina Grande, PB, BrazilCashew cultivation is an activity of great socioeconomic relevance, especially for agriculture in the semi-arid region of Northeast Brazil, standing out as an option to generate jobs and income. Thus, the present study aimed to evaluate the photosynthetic pigments and photochemical efficiency of precocious dwarf cashew under salt stress and potassium fertilization. The study was conducted using a Regolithic Neosol with sandy loam texture, adopting a randomized block design in 5×2 factorial arrangement, which corresponded to five levels of electrical conductivity of irrigation water—ECw (0.4; 1.2; 2.0; 2.8 and 3.6 dS m<sup>-1</sup>) associated with two doses of potassium fertilization—KD (100 and 150% of recommendation), with three replicates and two plants per plot. Increasing water salinity inhibited chlorophyll synthesis and decreased electron transport rate and quantum yield of non-regulated energy dissipation in precocious dwarf cashew, at 50 days after sowing. There was significant interaction for chlorophyll <em>a</em> and <em>b</em> contents and the effects of salt stress were intensified by potassium doses on the chlorophyll <em>b</em> content of precocious dwarf cashew. Potassium doses of 100 and 150% of recommendation (150 and 225 mg K<sub>2</sub>O kg<sup>-1</sup> of soil) do not mitigate the effect of salt stress on photosynthetic pigment synthesis and photochemical efficiency of cashew plants in the rootstock formation phase.https://www.aimspress.com/article/10.3934/agrfood.2019.4.1007/fulltext.html<i>anacardium occidentale</i> l.water salinityattenuating agentwater scarcitysemi-arid |
| spellingShingle | Geovani S. de Lima Vicente Elias da S. Neto Hans R. Gheyi Reginaldo G. Nobre Genilson L. Diniz Lauriane A. dos Anjos Soares Pedro D. Fernandes Fernandes A. de Almeida Francisco Wesley A. Pinheiro Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization AIMS Agriculture and Food <i>anacardium occidentale</i> l. water salinity attenuating agent water scarcity semi-arid |
| title | Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization |
| title_full | Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization |
| title_fullStr | Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization |
| title_full_unstemmed | Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization |
| title_short | Photosynthetic pigments and photochemical efficiency of precocious dwarf cashew (<i>Anacardium occidentale</i> L.) under salt stress and potassium fertilization |
| title_sort | photosynthetic pigments and photochemical efficiency of precocious dwarf cashew i anacardium occidentale i l under salt stress and potassium fertilization |
| topic | <i>anacardium occidentale</i> l. water salinity attenuating agent water scarcity semi-arid |
| url | https://www.aimspress.com/article/10.3934/agrfood.2019.4.1007/fulltext.html |
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