Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species
ABSTRACT The effects of water deficit on physiological and biochemical variables of young plants of two tropical woody species, Pachira aquatica and Sterculia foetida, and their recovery abilities were measured. Leaf water potential, gas exchange and selected carbon metabolism components were measured in a greenhouse experiment with control, moderate and severe water deficit treatments. Under severe drought stress, gas exchange and chlorophyll fluorescence decreased in both species compared to their respective controls. After rehydration, P. aquatica and S. foetida showed a partial and full recovery of the measured variables, respectively. In addition, a decrease and an increase in photosynthetic pigments were observed for P. aquatica and S. foetida, respectively, compared to their controls. In conclusion, the two species showed differing responses regarding photosynthetic pigment content dynamics for tolerating water deficit. Individuals of P. aquatica in the severe water deficit treatment showed a decrease in pigments, which may have impaired the recovery of metabolism (gas exchange) after rehydration, while S. foetida experienced an increase, favoring a full recovery of gas exchange and biochemical metabolism after rehydration.
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Sociedade Botânica do Brasil
2017
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oai:scielo:S0102-330620170002001532017-05-25Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen speciesFrosi,GabriellaHarand,WolfgangOliveira,Marciel Teixeira dePereira,SilviaCabral,Simone PereiraMontenegro,Abelardo Antônio de AssunçãoSantos,Mauro Guida chlorophyll fluorescence climate changes gas exchange semiarid water deficit ABSTRACT The effects of water deficit on physiological and biochemical variables of young plants of two tropical woody species, Pachira aquatica and Sterculia foetida, and their recovery abilities were measured. Leaf water potential, gas exchange and selected carbon metabolism components were measured in a greenhouse experiment with control, moderate and severe water deficit treatments. Under severe drought stress, gas exchange and chlorophyll fluorescence decreased in both species compared to their respective controls. After rehydration, P. aquatica and S. foetida showed a partial and full recovery of the measured variables, respectively. In addition, a decrease and an increase in photosynthetic pigments were observed for P. aquatica and S. foetida, respectively, compared to their controls. In conclusion, the two species showed differing responses regarding photosynthetic pigment content dynamics for tolerating water deficit. Individuals of P. aquatica in the severe water deficit treatment showed a decrease in pigments, which may have impaired the recovery of metabolism (gas exchange) after rehydration, while S. foetida experienced an increase, favoring a full recovery of gas exchange and biochemical metabolism after rehydration.info:eu-repo/semantics/openAccessSociedade Botânica do BrasilActa Botanica Brasilica v.31 n.2 20172017-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200153en10.1590/0102-33062016abb0375 |
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Frosi,Gabriella Harand,Wolfgang Oliveira,Marciel Teixeira de Pereira,Silvia Cabral,Simone Pereira Montenegro,Abelardo Antônio de Assunção Santos,Mauro Guida |
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Frosi,Gabriella Harand,Wolfgang Oliveira,Marciel Teixeira de Pereira,Silvia Cabral,Simone Pereira Montenegro,Abelardo Antônio de Assunção Santos,Mauro Guida Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| author_facet |
Frosi,Gabriella Harand,Wolfgang Oliveira,Marciel Teixeira de Pereira,Silvia Cabral,Simone Pereira Montenegro,Abelardo Antônio de Assunção Santos,Mauro Guida |
| author_sort |
Frosi,Gabriella |
| title |
Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| title_short |
Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| title_full |
Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| title_fullStr |
Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| title_full_unstemmed |
Different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| title_sort |
different physiological responses under drought stress result in different recovery abilities of two tropical woody evergreen species |
| description |
ABSTRACT The effects of water deficit on physiological and biochemical variables of young plants of two tropical woody species, Pachira aquatica and Sterculia foetida, and their recovery abilities were measured. Leaf water potential, gas exchange and selected carbon metabolism components were measured in a greenhouse experiment with control, moderate and severe water deficit treatments. Under severe drought stress, gas exchange and chlorophyll fluorescence decreased in both species compared to their respective controls. After rehydration, P. aquatica and S. foetida showed a partial and full recovery of the measured variables, respectively. In addition, a decrease and an increase in photosynthetic pigments were observed for P. aquatica and S. foetida, respectively, compared to their controls. In conclusion, the two species showed differing responses regarding photosynthetic pigment content dynamics for tolerating water deficit. Individuals of P. aquatica in the severe water deficit treatment showed a decrease in pigments, which may have impaired the recovery of metabolism (gas exchange) after rehydration, while S. foetida experienced an increase, favoring a full recovery of gas exchange and biochemical metabolism after rehydration. |
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Sociedade Botânica do Brasil |
| publishDate |
2017 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200153 |
| work_keys_str_mv |
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