Mycorrhizal symbiosis induces plant carbon reallocation differently in C3 and C4 Panicum grasses

被引:34
作者
Rezacova, Veronika [1 ]
Slavikova, Renata [1 ]
Zemkova, Lenka [1 ]
Konvalinkova, Tereza [1 ]
Prochazkova, Vera [1 ]
St'vicek, Vaclav [1 ]
Hrselova, Hana [1 ]
Beskid, Olena [1 ]
Hujslova, Martina [1 ]
Gryndlerova, Hana [1 ]
Gryndler, Milan [1 ]
Puschel, David [1 ]
Jansa, Jan [1 ]
机构
[1] Acad Sci Czech Republ, Inst Microbiol, Lab Fungal Biol, Videnska 1083, CZ-14220 Prague, Czech Republic
关键词
C-13; labelling; Carbon (C) allocation; Mycorrhizal symbiosis; Panicum sp; Photosynthetic metabolism type; Phosphorus (P); REAL-TIME PCR; ARBUSCULAR MYCORRHIZAS; PHOSPHORUS UPTAKE; FUNGAL SYMBIONT; ROOTS; PHOTOSYNTHESIS; COLONIZATION; FLOW; CO2; GROWTH;
D O I
10.1007/s11104-018-3606-9
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Aims Although arbuscular mycorrhizal symbiosis is common in many plants with either C-3 or C-4 photosynthesis, it remains poorly understood whether photosynthesis type has any significant impact on carbon (C) fluxes in mycorrhizal plants. Thus, we compared mycorrhizal and non-mycorrhizal (NM) plants belonging to Panicum bisulcatum (C-3) to its congeneric P. maximum (C-4). Methods Plants were or were not exposed to arbuscular mycorrhiza (AM) fungal inoculation and/or phosphorus (P) fertilization. Plants' C budgets were assembled based on (CO2)-C-13 pulse-chase labelling and sequential harvesting. Results Mycorrhizal plants allocated on average 3.9% more recently fixed C belowground than did their NM counterparts. At low P, mycorrhizal C-3-Panicum plants allocated less C to aboveground respiration as compared to their respective NM controls. In contrast, mycorrhizal C-4-Panicum increased the rates of photosynthesis and allocated more C to aboveground respiration than the respective NM controls. At high P, the differences were less prominent. Conclusions We demonstrated consistent differences in aboveground C allocation due to AM symbiosis formation in congeneric C-3 and C-4 grasses. Both grasses benefited from AM symbiosis in terms of improved P uptake (at least at low P). These results advocate a holistic (whole-plant) perspective in studying C fluxes in mycorrhizal plants.
引用
收藏
页码:441 / 456
页数:16
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