| Full text | |
| Author(s): |
de Souza, Marcelo Claro
[1, 2]
;
Scalon, Marina Correa
[3]
;
Poschenrieder, Charlotte
[4]
;
Tolra, Roser
[4]
;
Venancio, Tiago
[5]
;
Teixeira, Simone Padua
[2]
;
Da Costa, Fernando Batista
[2]
Total Authors: 7
|
| Affiliation: | [1] Univ Brasilia, Brasilia, DF - Brazil
[2] Univ Sao Paulo, Sch Pharmaceut Sci Ribeirao Preto, AsterBioChem Res Team, Ribeirao Preto - Brazil
[3] Univ Oxford, Oxford - England
[4] Autonomous Univ Barcelona, Bellaterra - Spain
[5] Univ Fed Sao Carlos, Sao Carlos, SP - Brazil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Phytochemistry; v. 153, p. 58-63, SEP 2018. |
| Web of Science Citations: | 1 |
| Abstract | |
Mechanisms to detoxify aluminium (Al) is a hot topic for cultivated plants. However, little information is known about the mechanisms used by native plants to deal with Al-toxicity. In Cerrado, some generalist mistletoe species, such as Passovia ovata (Pohl ex DC.) Kuijt and Struthanthus polyanthus Mart. can parasitize Al-accumulating and Al-excluding plant species without any clear symptoms of toxicity and mineral deficiency, while Psittacanthus robustus (Mart.) Marloth, a more specialist mistletoe, seems to be an Al-dependent species, parasitizing only Al-accumulating hosts. Here we (i) characterized the forms and compartmentalization of Al in leaves of P. robustus; (ii) compared Ca and Al leaf concentration, and leaf concentration of organic acids and polyphenols between facultative Al-accumulating (P. ovata and S. polyanthus) and Al-dependent (P. robustus) mistletoe species infecting Miconia albicans (Sw.) Steud. (Al-accumulating species). P. robustus chelated Al3+ with oxalate and stored it in the phloematic and epidermic leaf tissues. Leaf Ca and Al concentration did not differ among species. Leaf oxalate concentration was higher in the Al-dependent species. Concentrations of citrate and phenolic compounds were higher in the leaves of the facultative Al-accumulating species. These results show that facultative Al-accumulating and Al-dependent species use different mechanisms to detoxify Al. Moreover, this is the first report on a mistletoes species (P. robustus) with a potential calcifuge behaviour in Cerrado. (AU) | |
| FAPESP's process: | 13/21293-6 - Progress on metabolomics studies of Cerrado plant species developed in different aluminium availabilities |
| Grantee: | Marcelo Claro de Souza |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |