ATMOSPHERIC CO2
; ELEVATED CO2
; RISING CO2
; CHLOROPHYLL FLUORESCENCE
; EXTRAFLORAL NECTAR
; ELECTRON-TRANSPORT
; FRUCTAN METABOLISM
; INSECT HERBIVORY
; PLANT DEFENSES
; GAS-EXCHANGE
WOS学科分类:
Plant Sciences
WOS研究方向:
Plant Sciences
英文摘要:
This study evaluated the photochemical responses of photosystem II and growth of Hymenaea stigonocarpa under CO2-enriched conditions with exposure to simulated herbivory events. After herbivory simulation in two distinct parts of the stem of plants (apex and base), chlorophyll a fluorescence, chlorophyll index, growth, extrafloral nectary density, leaf mineral nutrition, and biomass production were evaluated. Plants of H. stigonocarpa grown under high [CO2] after simulated herbivory in the apical part of the stem had higher electron transport rate, effective quantum yield of photosystem II, and chlorophyll contents. However, simulated herbivory in the basal portion of plants grown under high [CO2] increased plant height, branch and root length, leaf number, leaf area, node number, and leaf expansion rate. In conclusion simulated herbivory at the basal portion and high [CO2] induce positive responses in H. stigonocarpa, leading to the allocation of biomass to vegetative parts related to the capture of resources such as water and light. Apical leaves could compensate for the elimination of part of their leaf blades by increasing their photosynthetic yield. Thus, the increase of [CO2] attenuated the adverse effects of leaf removal on H. stigonocarpa plants by inducing photosynthetic improvement and growth after the loss of leaf tissue.
1.Univ Fed Vicosa, Inst Biol, BR-35690000 Florestal, MG, Brazil 2.Univ Fed Minas Gerais, Dept Biol Geral, BR-31270901 Belo Horizonte, MG, Brazil 3.Univ Fed Oeste Para, BR-68170000 Juruti, PA, Brazil
Recommended Citation:
Maia, Renata A.,Fernandes, Geraldo W.,Silva, Advanio I. S.,et al. Improvement in light utilization and shoot growth in Hymenaea stigonocarpa under high CO2 concentration attenuates simulated leaf herbivory effects[J]. ACTA BOTANICA BRASILICA,2019-01-01,33(3):558-571