Foliar and root Cu supply affect differently Fe- and Zn-uptake and photosynthetic activity in soybean plants

Growth, root and leaf structure, and biomass allocation in Leucanthemum vulgare Lam. (Asteraceae) as influenced by heavy-metal-containing slag

“…The effective level of metals which lead to reduced amounts of chlorophyll may also depend on growth conditions, such as availability of other ions, or illumination. Studies in which chlorophyll reduction in response to Cu or Ni has been observed are often conducted in a growth chamber or a greenhouse, with reported light intensities of 300 μmol m −1 s −1 or less (Gajewska et al 2006;Kopittke and Menzies 2006;Martins and Mourato 2006;Alam et al 2007;Bernal et al 2007;Tanyolaç et al 2007). Our experiment was conducted outdoors with maxima over 2,000 μmol m −1 s −1 .…”

Effect of Sulphur and Iron Fertilization on Growth and Yield of Greengram [Vigna radiata L.]

“…Although, total iron content of soils is much higher than requirement of plant but its bioavailability is limited (Guerinot and Yi, 1994). Foliar feeding is a new and controversal technique of feeding plants by applying liquid fertilizer directly to their leaves (Bernal et al, 2007 andBaloch et al, 2008). Sulphur has been recognised as an essential major nutrient for plant and it ranks 4 th macronutrient after N, P and K because of its role is synthesis of proteins, vitamins, enzyme and flavoured compounds in plant.…”

Micronutrient concentration in potato clones with distinct physiological sensitivity to Al stress

“…However, when present in elevated concentrations it affects different parameters of plant metabolism, such as dry mass accumulation (ALI et al, 2002;ZHENG et al, 2004), chlorophyll (LOU et al, 2004, and water content (BURZYNSKI & KLOBUS, 2004) and the balance in macro-and micronutrient levels (ALI et al, 2002;BERNAL et al, 2007). Being a redox active metal, Cu generates reactive oxygen species (ROS) by Fenton reaction, which may result in oxidative stress leading to peroxidation of membrane lipids (STOHS & BAGCHI, 1995).…”