Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense
Abstract This study evaluate growth, gas exchange, solute accumulation and activity of antioxidant enzymes in dwarf cashew clones subjected to salinity. Shoot dry mass reduced 26.8% (CCP06) and 41.2% (BRS189) at 16 dS m-1, concerning control. For net photosynthesis, CCP06 and BRS189 presented 69.8%...
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| Format: | Article |
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Academia Brasileira de Ciências
2021-03-01
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| Series: | Anais da Academia Brasileira de Ciências |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101503&tlng=en |
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| author | NARA LÍDIA M. ALENCAR ALEXANDRE B. DE OLIVEIRA JUAN C. ALVAREZ-PIZARRO ELTON C. MARQUES JOSÉ T. PRISCO ENÉAS GOMES-FILHO |
| author_facet | NARA LÍDIA M. ALENCAR ALEXANDRE B. DE OLIVEIRA JUAN C. ALVAREZ-PIZARRO ELTON C. MARQUES JOSÉ T. PRISCO ENÉAS GOMES-FILHO |
| author_sort | NARA LÍDIA M. ALENCAR |
| collection | DOAJ |
| description | Abstract This study evaluate growth, gas exchange, solute accumulation and activity of antioxidant enzymes in dwarf cashew clones subjected to salinity. Shoot dry mass reduced 26.8% (CCP06) and 41.2% (BRS189) at 16 dS m-1, concerning control. For net photosynthesis, CCP06 and BRS189 presented 69.8% and 34.7% of reduction, respectively. Na+ and Cl- contents increased in leaves and roots, in both clones, although CCP06 leaves presented Na+ concentrations lower than those of BRS189, the first one was the clone that the most accumulated such toxic ion, whereas K+ content remained almost unchanged for both clones. Soluble N-amino was the organic solute that more varied with salinity in cashew seedlings. Salt stress increased the activity of superoxide dismutase in both clones, mainly 16 dS m-1 treatment. Additionally, salinity promoted increases in ascorbate and guaiacol peroxidase activities, and the last enzyme was the main involved in H2O2 removal. Despite the reductions in growth and gas exchange, dwarf cashew seedlings of both clones presented an osmotic adjustment mechanism, and an efficient enzymatic antioxidant system that were able to attenuate the salt and oxidative stress, respectively. Our research suggested that BRS189 clone is more tolerant to salt stress than CCP06. |
| first_indexed | 2024-04-11T15:17:25Z |
| format | Article |
| id | doaj.art-a1e627a0772743ecbe835d1c30822239 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-04-11T15:17:25Z |
| publishDate | 2021-03-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-a1e627a0772743ecbe835d1c308222392022-12-22T04:16:27ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902021-03-0193110.1590/0001-3765202120180534Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defenseNARA LÍDIA M. ALENCARhttps://orcid.org/0000-0001-6658-2929ALEXANDRE B. DE OLIVEIRAhttps://orcid.org/0000-0002-5142-5143JUAN C. ALVAREZ-PIZARROhttps://orcid.org/0000-0002-3408-4834ELTON C. MARQUEShttps://orcid.org/0000-0002-9140-2819JOSÉ T. PRISCOhttps://orcid.org/0000-0002-0447-0611ENÉAS GOMES-FILHOhttps://orcid.org/0000-0001-5945-6596Abstract This study evaluate growth, gas exchange, solute accumulation and activity of antioxidant enzymes in dwarf cashew clones subjected to salinity. Shoot dry mass reduced 26.8% (CCP06) and 41.2% (BRS189) at 16 dS m-1, concerning control. For net photosynthesis, CCP06 and BRS189 presented 69.8% and 34.7% of reduction, respectively. Na+ and Cl- contents increased in leaves and roots, in both clones, although CCP06 leaves presented Na+ concentrations lower than those of BRS189, the first one was the clone that the most accumulated such toxic ion, whereas K+ content remained almost unchanged for both clones. Soluble N-amino was the organic solute that more varied with salinity in cashew seedlings. Salt stress increased the activity of superoxide dismutase in both clones, mainly 16 dS m-1 treatment. Additionally, salinity promoted increases in ascorbate and guaiacol peroxidase activities, and the last enzyme was the main involved in H2O2 removal. Despite the reductions in growth and gas exchange, dwarf cashew seedlings of both clones presented an osmotic adjustment mechanism, and an efficient enzymatic antioxidant system that were able to attenuate the salt and oxidative stress, respectively. Our research suggested that BRS189 clone is more tolerant to salt stress than CCP06.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101503&tlng=enAnacardium occidentale L.osmoregulationoxidative protectionphotosynthesissalinity |
| spellingShingle | NARA LÍDIA M. ALENCAR ALEXANDRE B. DE OLIVEIRA JUAN C. ALVAREZ-PIZARRO ELTON C. MARQUES JOSÉ T. PRISCO ENÉAS GOMES-FILHO Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense Anais da Academia Brasileira de Ciências Anacardium occidentale L. osmoregulation oxidative protection photosynthesis salinity |
| title | Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense |
| title_full | Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense |
| title_fullStr | Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense |
| title_full_unstemmed | Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense |
| title_short | Differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense |
| title_sort | differential responses of dwarf cashew clones to salinity are associated to osmotic adjustment mechanisms and enzymatic antioxidative defense |
| topic | Anacardium occidentale L. osmoregulation oxidative protection photosynthesis salinity |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652021000101503&tlng=en |
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