Influence Of Temperature And Light Intensity On Morphological And Structural Trait Of Leaf Of Seedings Of Quercus Variabilis And Q.Mongolica

Leaf of plants is the main place to photosynthesis and transpiration, also is the most sensitive and the most plasticity organ with the change of environment in the process of the evolution of plants, and it has formed various type of adaptation under different selection pressures, so the morphological and structural trait of leaf can reflect the influence of environmental factors or plant adaptability to the environment.The research on plant responses to global climate change and environmental stress dated from field observation, however, with the deepening of the research, interior control experiments are increasingly become the main form of plant physiological ecology research. Quercus is the largest genus in Fagaceae, as one of the most important forest species, there are about110species in China. Also Quercus are valuable in ecology and economics. There are few studies about interior control experiments of the relationship between leaf trait of Quercus and environmental factors.This study, which is about the influence of temperature and light intensity on morphological and structural trait of leaf of Quercus variabilis and Q. mongolica, it will be the basic data of the research which study the leaf response to the environment changes.The seedings of Quercus variabilis B1.and Quercus mongolica Fish. Ex Ledeb. were taken to study the influence of temperature and light intensity on leaf shape and anatomical structures.With the pot culture, the artificial climate box was used to study the leaf trait of the seedings of Quercus variabilis B1. and Quercus mongolica under different temperature and light intensity.This experiment made use of Adobe Photoshop CS3、Image-Pro Plus6.0、SPSS13.0to analyse the leaf shape of Quercus variabilis B1. and Quercus mongolica under different temperature and light intensity.By the method of frozen section, we got the transverse section of the different parts on leaves of Quercus variabilis B1. and Quercus mongolica under different temperature and light intensity, and we obtained the data of anatomical structures of different parts on leaves through measuring by the micro-scanning software AM&DSS2.0、 MIE3.1. Compared all the sections of the two Quercus leaves, we found that with the rise of temperature, the blade length and width of Quercus variabilis B1. is increasing; Though the morphological trait of leaf of Quercus variabilis is insensitivity with the change of light intensity. The greater the intensity of the light, the blade length of Quercus mongolica is shorter. The anatomical structure of midvein of Quercus variabilis B1. in the leaf apex and the upper part of leaf, with the rise of temperature, phloem fiber is increasing; in the petiole of Quercus variabilis B1., with the rise of temperature, vascular bundle group is increasing. Though the ratio of palisade tissue and spongy tissue of Quercus variabilis B1.and temperature doesn’t have linearity relation. Also the ratio of palisade tissue and spongy tissue of Quercus variabilis B1.and light intensity doesn’t have linearity relation. Both of the phloem and epidermis of Quercus variabilis B1. and light intensity doesn’t have linearity relation. In the anatomical structure of leaf margin, both of the epidermis and the ratio of palisade tissue and spongy tissue of Quercus variabilis B1. and light intensity doesn’t have linearity relation. The anatomical structure of midvein of Quercus mongolica in the middle part of leaf, the greater the intensity of the light, the palisade tissue is smaller. In the petiole part of Quercus mongolica, the greater the intensity of the light, the leaf is thicker. Though the palisade tissue of Quercus mongolica and light intensity doesn’t have linearity relation.