Protective role of bioregulator stifun under the negative effect of cadmium

The effect of stifun on wheat, Welsh onion, and corn plants under the effect of cadmium is investigated. The protective effect of this bioregulator manifested itself in preventing inhibition of growth, stabilizing mitotic phases, and reducing the level of chromosomal aberrations. The results of histochemical investigations permit the assumption that growth regulators can reduce the uptake of cadmium ions into plant tissues.     

真空包装草鱼片低温贮藏后微观结构及理化性质的变化

为研究真空包装草鱼片在低温条件下的变化,将真空包装草鱼片分别于-18、0、4、10℃贮藏15 d,以贮藏期间K值(ATP分解指数)的变化来评价其化学变化。结果表明:在0、4、10℃下贮藏15 d后,草鱼肌纤维间的空隙变大,由于鱼肉内水的结晶,在-18℃下肌纤维间的空隙达到最大(约100μm);随着贮藏时间的延长,鱼片的持水能力显著下降,-18℃下贮藏鱼片的持水能力最低,0、4℃贮藏鱼片的持水能力高于10℃贮藏鱼片;于较高温度(0、4、10℃)贮藏后,鱼肉的亮度值(L*)、红绿值(a*)和黄蓝值(b*)均较高,在-18℃低温贮藏后鱼肉的亮度值增加;随贮藏时间的延长,鱼片颜色(色差仪分析结果)趋向于红色值和黄色值增大;在-18℃贮藏15 d后,鱼片仍然新鲜,但质构变差。     

Antistress activity of plant growth regulator Epin-extra

The physiological activity of the plant growth regulator Epin-extra is investigated under conditions of sodium chloride salinity, cadmium stress, and low temperature. Epin-extra lessens the negative effect of stress factors on growth of spring wheat, Welsh onion, and cabbage: it reduces the level of cadmium-induced chromosome aberrations and concentration of this metal in plants exposed to a cadmium acetate solution. An increase of the level of expression of the cabbage cold shock protein gene (CSP5) under the effect of the bioregulator is established by the real-time PCR method with the use of interprimer fluorescence resonance energy transfer.