Light affects the process of plant growth, development and differentiation, which is very important for plant morphogenesis. Light plays a signal role in this process. Light quality and light quantity significantly affect the expansion and growth of leaves, mainly regulated by light receptors. Normally, blue light and red light can promote the expansion of the leaves, but the mechanism of the two seems to be different. Light-induced ion dynamics are very important in regulating osmosis, turgor pressure and growth rate, and can explain the mechanism of leaf expansion and growth. In recent years, Australian scientist Shabala et al. Used non-damaging micro-measurement techniques to study the ion dynamics of light influencing the expansion and growth of leaves, and found that the ion current has a significant dose dependence on red and blue light. The light-induced K + kinetics are different in growing and non-growth tissues. This difference is due to the direct involvement of epidermal-controlled leaves in the red light-induced K + during expanded growth, and the role of K + exchange balance in mesophyll cells. In the growing leaf area, blue light stimulation is more effective than red light stimulation of K + absorption. In addition, red light affects Ca2 + flow more strongly than blue light, and red light is more important in signal transduction of leaf growth. This study directly measured the ion currents of leaves and mesophyll cells through non-damaging micro-measurement technology, proving that blue and red light have different effects on the growth of leaves, providing more refined evidence for us to understand the formation of light morphology, and then guiding people How to make better use of light to regulate plant growth. Keywords: Expansion growth; blue light; red light; white light; photosynthesis; corn (Zea mays L); ion flux (Ion flux); non-damaging micro-measurement technology (MIFE) References:? Ivanovi? BD, et al. Plant and Cell Physiology, 2007, 48: 598-605.
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