Study On The Physiological Stress And Stem Leaf Anatomy And Tissue Water Emical Characteristics

The Department of the original metachlamydeae Brasenia Nymphaeaceae Chun is a perennial freshwater aquatic perennial herb,also known as lake water,food,Caltha palustris sunflower,Sunflower Growth in water dew,ponds,lakes and swamps,once known as the new century ecological aquatic vegetables.The process of growth and development in Brasenia is needed for the light conditions of illumination intensity,water quality,sediment rich clarification,and its habitat is extremely sensitive for water.It is in the mountainous area of Wuling rare aquatic vegetables,is the city of Lichuan and Shizhu County agricultural pillar industry.However,in recent years,the trend of large-scale reduction year by year has aroused great attention.The body is composed of apoplastic barrier structure interface between plants and environmental protection organizations,including skin diffuse suberinlamellae table plant root,inside and outer layer of Casparian strips and suberization and lignification of the secondary wall,or subcutaneous layer of lignified thickening;hypocotyls,stems and leaves,stalks of the cuticular surface inner and outer cortex and vascular cell wall's hearing and pin with suberization and lignification of the secondary wall,can prevent water,mineral ions and oxygen,resistance to pests such as the import from plants inside and outside of freedom,so it has important physiological functions of plant protection and defense.Analytical study on morphological structure of the matter but no water,no studies on the body function barrier structure and protection report.Pressure Water scarcity of wild resources in China and its related products in short supply in the world.At present,China's water is mainly distributed in Enshi Lichuan,in recent years due to the destruction of its habitat Brasenia disturbed habitats,habitat destruction is fragmentary and scattered,leading to the diversity of community structure and species composition of simple cultivation water,weak anti-interference ability,weak competition between species,to reduce the population of Brasenia schreberi.Water pollution is serious and vulnerable to toxic ions such as heavy metals.The product yield and poor quality water,and artificial planting started late,field cultivation and extensive management,the living environment of small,so in the introduction of the issue has been difficult to succeed,not to mention the promotion and cultivation of cross regional water shield.In view of the anatomy and histochemistry of the stem and leaf of Brasenia schreberi,understand its structural features as primitive angiosperms,adapt to the aquatic environment of the apoplastic barrier structure of polluted water sensitive;study of different nutrient solution on the growth and the effect of Brasenia ammonium ion on the effect of physiological stress analysis of Brasenia,the most suitable growth environment of Brasenia schreberi analysis of the endangered condition,even in the face of the cause of their extinction will have an important help,has guiding significance for the future development of water ecological agriculture cultivation and management.The main contents and results are as follows:(1)by vegetative propagation from Brasenia plants in fields as test materials,training in nutrition environment test Brasenia under different concentrations,the growth of the observation and analysis of Brasenia plant,the experimental results show that 1/4,the experiment set;1/8,1/16,1/32 four kinds of nutrient solution concentrations were not conducive to a comprehensive analysis Brasenia,growth,may be suitable for the situation in the oligotrophic water,in the vigorous growth stage,it should not add fertilizer,so as not to inhibit the growth of Brasenia schreberi.(2)by vegetative propagation from Brasenia field plant as the experimental material,effects of ammonium ions on enzyme activity in water.In the light of good natural environment,will be placed in different concentrations of Brasenia containing ammonium ion in environmental water culture,and analysis of changes in enzyme activity of Brasenia schreberi growth was observed,the results show that the ability to adapt to the actual weak water shield Brasenia production management and provide guidance,promote Lichuan Chun vegetable industry development.(3)to collect the farmland cultivation in a vigorous growth period water samples,combined with the research methods of plant tissue cell wall histochemistry,using freehand section in ordinary optical microscopy and fluorescence microscopy to study the anatomical structure of stem and leaf of Brasenia schreberi and barrier junction structure,the detailed anatomy of Brasenia schreberi: including the various developmental stages of adventitious roots,stems,roots,stems,stalks and leaves as the primary structure,the Casparian strip and suberinlamellae,adventitious roots with epidermis,cortex is enlarged honeycomb aerenchyma;medial cortex endothelial layer and outer skin layer,Casparian strip and suberinlamellae,thread and ring vessel.The main stem has a reticular middle column,the central bundle of the primary bundle is a bundle of fibers,and the surrounding cells have no tissue differentiation.The roots,stems and stalks in the column with 2 primary Vibanry,petiole 1 primary roots and erect Vibanry Vibanry;primary cell wall sheath with KayBand and woody,pedicel and petiole sheath cell wall without histochemical fferentiation.The main primary vascular bundles appeared only in the separation near the lignification of conduit thread,and roots,erect stems and petioles,pedicel primary xylem conduit thread.Water barrier structure as follows: stem abscission and adventitious roots and surrounding cortical cell wall of Casparian strip,suberization and lignification;other parts of epidermis with mucus and discontinuous cuticles,and under the wooden skin layer.The roots and erect epidermal mucus and discontinuous outer cuticle,and the wooden skin layer,primary vascular bundle sheath cell wall Casparian strip and lignification.