The corresponding relationship between roles of NADP-malic<br>enzymes and abiotic stress in plants

Abstract

Many proteins play important roles in production of metabolic energy and plant growth. NADP-malic enzyme is one of these proteins. It mainly locates on cell and organelle membrane. It not only takes part in the process of photosynthesis, but also joins the improving of plant stress tolerance. In this review, we stated the variation of the NADP-malic enzyme activity and the photosynthesis rate of plant under some main abiotic stresses (drought, salt and temperature stress). It is demonstrated that the activity of NADP-malic enzyme is increasing under different stresses, which was used to prevent the decline of plant photosynthesis to resist stresses. The expression of the NADP-malic enzyme gene, which is dissimilar under different stresses, is another point in this paper. At the same time, the enzyme in C4, CAM and C3 plant have different expression intensity under the same stress. We analyzed the mechanisms how NADP-malic enzyme to resist stresses by combined theory with experimental fact.

Impact of abiotic stress on photosynthetic efficiency and leaf temperature in sunflower

“…Some sunflower hybrids in T1 had higher values of PI AbS (h1, h4, h5, h7, h8, h9, h12), while the remaining hybrids reacted by decreasing their PI AbS values (h2, h3, h6, h10, h11, h13) (Figure 1). The plants first reaction to drought stress in the early stages of its growth is an increase in photosynthetic performance index (kovačević et al, 2013), which is considered defensive mechanisms of plant's photosynthetic apparatus on mild or moderate drought stress (Liu et al, 2010). A significant impact of treatments on PI AbS ( Table 1 Although ANOVA showed no statistically significant differences between hybrids for LT (Table 1), Duncan's test found differences, but only for hybrids in normal growing conditions (Figure 1).…”