The main reasons are:
1. The environment for root development is optimized. Plant roots grow and travel in the soil, and under the action of resistance, the root tissues will mechanize fibrosis and aging, forming a cork-like soil root system. When developed in the aerosol space, the adaptability of the root system has changed from the original terrestrial form to the aerial form. The root system can grow and differentiate rapidly in an environment with unlimited and no resistance to form a huge root system. .
2. The change of root structure is conducive to plant growth. The aerosol root system is an adventitious root system, which can directly and efficiently absorb water and nutrients, and the root surface area and number are significantly increased. In addition, most of the composite roots formed by aerial and aquatic roots are mainly basal roots, which can directly send the absorbed water and nutrients to the branches and leaves on the ground through the roots, without the need for multi-stage transmission like most terrestrial plants, which is consumed. A lot of bioenergy is a kind of high-efficiency and energy-saving root system.
3. The root elongation zone is particularly developed. No matter what kind of plant is cultivated by aerosol, the growth of the root system shows super-conventional activity and rapid development and extension, so its elongation zone is several times that of the ordinary root system, which obviously promotes the development and rapid extension of the root system.
4. The root exudates are reduced. The secretion of substances is a product of external stimulation. When the roots encounter friction or are stressed by factors such as temperature, water, nutrition, oxygen, or stimulated by microorganisms and pathogenic bacteria, they will secrete a large amount of sugar, acid, and intermediates. Metabolites, if the hypoxic environment will cause the accumulation of toxic alcohol in the roots and the secretion of a large amount of acetic acid and acetaldehyde, it is the root cause of root rot. However, in aerosol environment, the role and function of secretions are greatly reduced, and the adaptive development of plants shows that secretions are significantly reduced, and ecological functions are significantly weakened. More biological energy is used for the growth of roots and above-ground branches and leaves. Therefore, it promotes the rapid development of plants, and the efficient growth of energy saving, that is, the biological conversion rate can be greatly improved.
5. Enhanced root respiration. In aerosol environment, especially in the extremely fine space where the atomization develops, the fluffy aerial roots are particularly developed. The surface area of this root system is extremely large, and the breathing intensity is several times or even dozens of times that of ordinary roots. Therefore, its absorption power is also significantly stronger than that of ordinary roots. The respiration-enhanced aerial roots provide more sufficient bioenergy for root absorption, promote the rapid metabolism and absorption of water and nutrients, thereby promoting the development and growth of the whole plant.
In short, the above-mentioned characteristics of aerial roots are the performance of ecological adaptability under aerosol environment, and the development of physiological ecology and morphological response under special environments. Aerial root is a kind of root system formed under the most suitable root zone environment. It represents high efficiency and strong regeneration of development, and becomes the main reason to promote rapid growth on the ground.
The influence of light intensity on plant photosynthesis, the influence of light intensity on plant photosynthesis, and the influence of light intensity on plant leaf fluorescence characteristics and light response curve will have an important effect. Li Changying and Zhu Qijie (1997) studied the effect of light intensity on the photosynthetic apparatus of cucumber leaves and found that the maximum luminous flux density dropped from 1000uE*m-2*s-1 to 300uE*m-2*s-1 on the variable fluorescence of cucumber leaves. Increased, the redox activity of the original electron acceptor of PS increases. As the light intensity decreases, qP and ETR gradually decrease, NPQ shows an upward trend, and the light saturation point and light compensation point also increase with the increase of light intensity. Shading reduces the respiration of leaves (Boardman, 1977). Reducing the light intensity will reduce the activity of RuBP carboxylase and increase the quantum efficiency of the surface. The table shows that the quantum efficiency reflects the photosynthetic capacity of the leaves under lower light intensities, but the larger the value does not mean the greater the Pn, but it indicates that the plant may absorb and convert light energy more pigment protein complexes. The stronger the ability.
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