Effect of mineral nutrition on the metabolisms of phenolic compounds in plants.

1)研究了缺氮、缺磷、缺锰对富含花色苷的玉米品种黄心(YD)和花青素含量较低的金交种(GC)幼苗花色苷等酚类化合物形成的影响。氮素亏缺对YD和GC叶片中总二烯醇类和黄烷醇含量的影响比P亏缺更为显着。对于YD，缺磷导致叶片中花青素的大量积累，而缺氮对花青素的积累影响较小。另一方面，GC中的花色苷几乎没有受到这些缺陷的影响。当磷、锰同时缺乏时，YD花色苷含量几乎没有增加。无论是YD还是DC，缺磷引起的亮氨酸半胱氨酸含量增加幅度均大于缺N引起的增加。缺磷或缺氮均能增加红豆杉(YD)和红豆杉(Gc)叶片中酚酸的含量。2)以红豆杉(Red…)幼苗为试材，研究了缺锰对叶片多酚代谢的影响更多的生菜(Lacutuca sativa L.)和红甘蓝(Bracssica oleracea L.)用缺锰培养液对幼苗进行水培，测定苯丙氨酸解氨酶(PAL)活性、总酚、花青素和叶绿素含量。缺锰导致红生菜和红甘蓝叶片PAL活性、总酚和花色苷含量下降，其中花色苷下降最为显著。红甘蓝上部叶片花色苷含量变化与叶绿素含量变化无关。表明锰在苯酚代谢中有直接作用，特别是在抗花青素的形成中。3)菜豆叶片中含有酚酸类物质。在含有不同浓度的锰的营养液中生长。轻度过量的锰提高了PAL活性和酚酸含量，而过量的锰则降低了酚酸，尤其是咖啡酸。4)分子筛色谱研究了硅、钙与水稻叶鞘细胞壁的结合情况。硅和钙似乎与细胞壁中的木质素碳水化合物复合体结合。较少

1) Effects of N, P and Mn deficiencies on the formation of anthocyanin and other phenolic compounds were investigated with seedlings of two cultivars of corn (Zea mass L.), Yellow dent (YD), rich in, and Golden crossbantam (GC), poor in anthocyanin. Nitrogen deficiency increased the contents of total plienol and flavanol in the leaves of both YD and GC more remarkably than P deficiency. For YD, P deficiency caused a drastic accumulation of anthocyanin in the leaves, while the accumulation by N deficiency was slight. On the other hand, anthocyanin in GC was scarcely changed by the deficiencies. Anthocyanin content in YD was scarcely increased when P and Mn was simultaneously deficient. The increase in leucoantliocyallin content caused by P deficiency was greater than that by N deficiency both in YD and DC. Phenolic acids contents in the leaves of both YD and GC were increased by P or N deficiency.2) Effects of Mn deficiency on plieyiol metabolism were investigated with seedlings of red … More lettuce (Lacutuca sativa L.) and red cabbage (Bracssica oleracea L.). After the seedlings were water-cultured with Mn deficient culture solutions, phenylalanine ammonia-lyase (PAL) activity, total phenol, anthocyanin, and chlorophyll contents were determined. Manganese deficiency caused decreases of PAL activity, total phenol and anthocyanin contents in the leaves of both red lettuce and red cabbage, among which the decrease of anthocyanin was more remarkable. The anthocyanin content changed unrelated with the chlorophyll content in the upper leaves of red cabbage. It is suggested that Mn has a direct function in phenol metabolism, especially in antliocyanin formation.3) Phenolic acids were determined in the leaves of kidney bean (Pliaseolus vulgaris L.) grown in nutrient solutions containing different concentrations of Mn. PAL activity and phenolic-acids contents were increased by the slight excess of Mn, while phenolic acids, especially caffeic acid were decreased by the severe excess.4) Silicon and Ca combined with cell wall of the leaf sheath of rice plants were investigated by molecular sieve chromatography. Silicon as well as Ca appeared to be combined with lignincarbohydrate complexes in the cell wall. Less