[Analysis of mineral elements of sunflower (Helianthus annuus L.) grown on saline land in Hetao Irrigation District by ICP-AES].
The absorption and accumulation of ten mineral elements in four kinds of organs (root, steam, leaf and flower disc) in Helianthus annuus L. plants cultured in Hetao Irrigation District under different level of salinity stress were determined by ICP-AES with wet digestion (HNO3 + HClO4). The results showed that: (1) The contents of Fe, Mn, Zn, Ca, and Na were highest in roots, so was K in stems, B and Mg in leaves and P in flower discs, while no significant difference was detected in the content of Cu among these organs; (2) The cumulants of Ca, Mg, P, Cu, B and Zn were highest in flower discs, so were Na, Fe and Mn in roots and K in stems; (3) In sunflower plants, the proportion of mineral element cumulant for K : Ca : Mg : P : Na was 16.71 : 5.23 : 3.86 : 1.23 : 1.00, and for Zn : Fe : B : Mn: Cu was 56.28 : 27.75 : 1.93 : 1.17 : 1.00, respectively; (4) The effect of salinity stress on absorption of mineral elements differed according to the kind of organ and element, root was the most sensitive to soil salt content, followed by stem and leaf, and the effect on flower disc seemed complex.
Wen-Jie
WJ
Tong
Fu
F
Chen
Xin-Ya
XY
Wen
D035264:Flowers; D006368:Helianthus / Q000737:chemistry*; D008903:Minerals / Q000032:analysis*; D018515:Plant Leaves; D018517:Plant Roots; D018547:Plant Stems; D054712:Salinity; D012965:Sodium Chloride; D012987:Soil
D008903:Minerals; D012987:Soil; D012965:Sodium Chloride