Allelopathic hypotheses revisited: the interactions between native and exotic species in the Brazilian savanna

被引：0

作者：

Souza, Cristiele Dos Santos ^{[1
]}

Marins, Gabriel ^{[2
]}

Camargo, Isabela Fernanda LG. ^{[3
]}

De Lima, Larissa Boaz ^{[1
]}

Gomes, Anabele Stefania ^{[1
]}

Borghetti, Fabian ^{[1
]}

机构：

[1] Univ Brasilia, Dept Bot, La Termobiol LG Labouriau, Campus Univ Darcy Ribeiro,Asa Norte S-N, BR-70919970 Brasilia, DF, Brazil

[2] Univ Brasilia, Dept Ecol, Lab Ecol Insetos, Campus Univ Darcy Ribeiro,Asa Norte S-N, BR-70919970 Brasilia, DF, Brazil

[3] Univ Brasilia, Dept Engn Florestal, Lab Manejo Bacias Hidrog, Campus Univ Darcy Ribeiro,Asa Norte S-N, BR-70919970 Brasilia, DF, Brazil

来源：

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS | 2025年 / 97卷 / 03期

关键词：

Allelopathy; initial growth; invasive grass; plant interaction; plant litter; savanna; MELINIS-MINUTIFLORA; INVASIVE GRASSES; ALIEN GRASSES; CERRADO; MANAGEMENT; PLANTS; GERMINATION; MECHANISM; GROWTH; RESTORATION;

D O I：

10.1590/0001-3765202520240252

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We investigated allelopathic interactions between native and exotic species of the Cerrado biome. We studied the effects of the exotic Andropogon gayanus and the native A. bicornis on the initial growth of two native (A. fastigiatus and Lepidaploa aurea) and two exotic species (Melinis minutiflora and Stapfochloa elata). Leaves or roots of the donors were each mixed at ratios of 0.75, 1.5 and 3% (litter/soil) with soil samples collected in the same areas where they spontaneously co-occur with their target species. We found that A. gayanus inhibited the growth of all target species, what agrees with the novel weapon hypothesis. The native A. bicornis stimulated the growth of the two native species and of S. elata but inhibited the growth of the exotic M. minutiflora, in line with the homeland security hypothesis. Our studies suggest that allelopathy may have a part in the invasiveness of A. gayanus and that the inhibitory effect of A. bicornis on the growth of M. minutiflora might help to control the spread of this exotic grass. We conclude that allelopathy may be involved in the interactions between species and be used in controlling the spread of exotic species over many areas of the Cerrado.

引用

页数：21

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