中国土壤与肥料
中國土壤與肥料
중국토양여비료
Soils and Fertilizers Sciences in China
2015年
5期
108-115
,共8页
胡义钰%孙亮%袁坤%王真辉
鬍義鈺%孫亮%袁坤%王真輝
호의옥%손량%원곤%왕진휘
番茄%丛枝菌根真菌%砷胁迫%磷含量%磷吸收
番茄%叢枝菌根真菌%砷脅迫%燐含量%燐吸收
번가%총지균근진균%신협박%린함량%린흡수
tomato%AMF%As-stress%P content%P uptake
采用盆栽法研究了砷 (As) 污染条件下 (As 0, 50, 100 和200 mg·kg-14 个水平) 丛枝菌根真菌( AMF) 接种对全生育期番茄植株生长及其磷 ( P) 营养的影响. 试验中各接种处理均成功侵染, 侵染率在11. 79% ~34. 36%之间. 砷胁迫显著影响番茄植株的生物量, 植株生长过程中各个时期地上部和根系干重均随As添加水平的升高而显著下降. 本试验同时发现As 50 mg·kg -1是不接种番茄植株忍受砷毒害的上限, 而接种丛枝菌根真菌后, 番茄忍受砷毒害的上限上调到100 mg·kg -1; 但200 mg·kg -1已达番茄忍受砷毒害的极限. 基质中添加砷对番茄植株不同生长时期地上部和根部磷含量有显著影响. 除开花期地上部与其不接种处理根部磷含量外, 幼苗期和坐果期植株地上部磷含量与根部磷含量均随着砷添加量的增加而呈大致递增趋势. 番茄植株生长的各个时期 (幼苗期、 开花期和坐果期) 地上部和根部磷吸收量随砷添加水平的增加呈明显下降趋势. 砷污染条件下, 接种丛枝菌根在一定程度上促进了植株生长及其对磷的吸收, 缓解了砷对植株生长的胁迫.
採用盆栽法研究瞭砷 (As) 汙染條件下 (As 0, 50, 100 和200 mg·kg-14 箇水平) 叢枝菌根真菌( AMF) 接種對全生育期番茄植株生長及其燐 ( P) 營養的影響. 試驗中各接種處理均成功侵染, 侵染率在11. 79% ~34. 36%之間. 砷脅迫顯著影響番茄植株的生物量, 植株生長過程中各箇時期地上部和根繫榦重均隨As添加水平的升高而顯著下降. 本試驗同時髮現As 50 mg·kg -1是不接種番茄植株忍受砷毒害的上限, 而接種叢枝菌根真菌後, 番茄忍受砷毒害的上限上調到100 mg·kg -1; 但200 mg·kg -1已達番茄忍受砷毒害的極限. 基質中添加砷對番茄植株不同生長時期地上部和根部燐含量有顯著影響. 除開花期地上部與其不接種處理根部燐含量外, 幼苗期和坐果期植株地上部燐含量與根部燐含量均隨著砷添加量的增加而呈大緻遞增趨勢. 番茄植株生長的各箇時期 (幼苗期、 開花期和坐果期) 地上部和根部燐吸收量隨砷添加水平的增加呈明顯下降趨勢. 砷汙染條件下, 接種叢枝菌根在一定程度上促進瞭植株生長及其對燐的吸收, 緩解瞭砷對植株生長的脅迫.
채용분재법연구료신 (As) 오염조건하 (As 0, 50, 100 화200 mg·kg-14 개수평) 총지균근진균( AMF) 접충대전생육기번가식주생장급기린 ( P) 영양적영향. 시험중각접충처리균성공침염, 침염솔재11. 79% ~34. 36%지간. 신협박현저영향번가식주적생물량, 식주생장과정중각개시기지상부화근계간중균수As첨가수평적승고이현저하강. 본시험동시발현As 50 mg·kg -1시불접충번가식주인수신독해적상한, 이접충총지균근진균후, 번가인수신독해적상한상조도100 mg·kg -1; 단200 mg·kg -1이체번가인수신독해적겁한. 기질중첨가신대번가식주불동생장시기지상부화근부린함량유현저영향. 제개화기지상부여기불접충처리근부린함량외, 유묘기화좌과기식주지상부린함량여근부린함량균수착신첨가량적증가이정대치체증추세. 번가식주생장적각개시기 (유묘기、 개화기화좌과기) 지상부화근부린흡수량수신첨가수평적증가정명현하강추세. 신오염조건하, 접충총지균근재일정정도상촉진료식주생장급기대린적흡수, 완해료신대식주생장적협박.
A pot culture experiment was conducted to assess the effects on growth and phosphorus uptake of tomato plants inoc-ulated with or without AMF species Glomus mosseae in the soil amended with four different levels of arsenic at As 0, 50, 100 and 200 mg·kg-1 during the whole growing stage. The results showed that all the inoculation treatments were successful infec-ted by AMF, and the infection rate was among 11. 79% ~34. 36%. The As-stress had significant impact on the biomass, the dry weight of shoots and roots were significantly decreased with the addition of As at different stages of plant growth. Without AMF the As tolerance upper limit of tomato was As 50 mg·kg-1 , however the value ascended to As 100 mg·kg-1 after my-corrhizal inoculation, and 200 mg·kg-1 AMF was the utmost for tomato's tolerance. The amended of As had a significant im-pact on phosphorus content of shoots and roots. In addition to antheis shoots and its uninoculated treatments roots, the phos-phorus content of shoots and roots at seeding and fruting stages showed roughly increasing trend with the increase of As level. The uptake of P at different stages of plant growth ( seedling, anthesis and fruiting stages) decreased significantly with the in-crease of As level. Mycorrhizal inoculation in a certain degree promoted the growth of plant and depressed the As-stress.
