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17 tomato cultivars inoculated with larva nematodes were used in this paper to investigate their resistance to root knot nenatodes. The results showed that gall index of LA1312, 3601, HA4402, LA1007 were higher than other tomato cultivars. Compared with control ‘Caihong101’, root activity of LA0655 was higher, and the lowest root activity was observed in 3601, whose gall index was the highest among...
The author researches on the allelopathy effects of different viscosity (0 ∼ 2.5g.mL−1) C. Cathayensis exocarp extracting solution, on green bean, wheat, soy bean and corn seeds. By calculation of the pot plants morphological and physiological indexes, the result shows: the viscosity (0.1∼0.5g.mL−1) solution could greatly promote the seed germination. The effects of the viscosity (0.1g.mL−1) solution...
Vegetation restoration was an effective approach of ecosystem rehabilitation in karst area. Selecting tree species well adaptive to karst environment and ascertaining their ecophysiological traits had a vital significance. We investigated photosynthetic diurnal changes of the dominant species Cinnamomum burmanii in the four seasons on the karst hill. Both the main photosynthetic parameters, such as...
In the last decade, the role of NO in plants has received much attention. Due to its multifunctional activities in plants, NO is now being considered as a new candidate plant hormone. However, it is not very clear that the physiological mechanism of exogenous NO alleviates salt effects in vegetable plants. Therefore, an experiment was conducted to study the effects of exogenous NO on physiological...
A new method for purification of wheat esterase was build which include four steps. The wheat esterase was purified to electrophoretically pure through ammonium sulfate saturation, ultrafiltration, Sephadex G150 and Procainamide affinity chromatography.The wheat esterase was puried 127 fold with specific activity 1264 U/mg after the four steps. The molecular weight of the wheat esterase estimated...
Radish(Raphanus sativus L.) vernalization is an important stage and has great relationship with carbohydrate metabolism. Leaves (source) and fleshy taproot (sink) carbohydrate levels were investigated between the vernalization (4 ° temperature treatment for 1 month: WVR) and non-vernalization (without low temperature treatment: NVR) radish. The results showed that during the “two-leaf” stage of WVR,...
Water deficiency is a main limiting factor for plant growth and development in arid and semi-arid areas, it can severely affect a wide range of physiological processes, such as respiration and photosynthesis of plants. Chlorophyll fluorescence assays provide a rapid and noninvasive means to study the behavior of plant photosynthesis systems under drought stress. In the past, more attentions were paid...
Sulfur dioxide (SO2) is one of the most toxic air pollutants for plants. The study chose five kinds of road trees which we have usually seen ever to research the influence for plants using sulfur dioxide gas. The trees are about 60∼90 cm in height, which were taken the fuming test for 48 hours, the concentration of the sulfur dioxide gas are 600, 1000, 2000 ppb. The test is to evaluate the resistance...
Total bacterial count, carbon substrate utilization and diversity of microorganism is analysed. The results show that there are many differences between two different watershed ecosystem in Wen Yu River.
Series of pot experiments were performed to determine the effects of cadmium in soil on chlorophyll content, CAT, POD and SOD activities in Brassica juncea. The results indicated that tolerance of Brassica juncea for Cd is stronger. It is able to burgeon and grow all right in the soil added Cd from mg·kg−1 to200mg·kg−1. The biomass of Brassica juncea takes on principle of parabola changes with Cd...
Suaeda salsa is a typical pioneer species which can grow well in high salt environmental conditions. The objective of this study is to evaluate the effect of different levels of salinity (5.25, 10.5 and 21g NaCl per kg soil) and nutrient supply (0, 0.3, 0.6 and 1.2g urea per kg soil) on plant morphology, biomass, accumulation of ions and C/N ratio in leaves of S. salsa. The results showed that the...
The aim of the present study was to determine the protective effect of peanut shell extract (EPS) on rats with acute renal failure(ARF)and possible mechanism of protection. Acute renal failure was induced by glycerol , which was injected intramuscularly in rats. Healthy male SD rats were randomly divided into 4 groups: ARF + NS group, ARF + EPS group, NS + NS group and NS + EPS group. The level of...
Phosphorus deficiency was induced in sugar beet plants (Beta Vulgaris L., ‘var. 14’, ‘var. 17’ and ‘var. 20’ with different resistance ability to phosphorus stress), cultured hydroponically and sandily under standardized environmental conditions, by removing phosphorus from the nutrient supply at the seedling stage. Root morphology, H+ excretion and organic acid in rhizosphere were investigated. The...
In the experimental condition, Pteridium aquilinum Net photosynthetic rate increase by Photosynthetic active Radiation increasing before it reachs Light saturation point, Light compensation pointis and Light saturation point are even lower, that is partly 50µmol·m−2·s−1 and 400µmol·m−2·s−1. It tells Pteridium aquilinum has character of shade plants. Some measures should be considered in the practical...
‘Dangshansuli’ pear is one of crisp pears and has a non-climacteric respiratory pattern. With ‘Dangshansuli’ pears which were in different pathological grades of superficial scald as material, the internal physiological indexes were determined to study the physiological change in superficial scald pears. The results indicated that it was obvious positive correlation between the contents of α-farnesene...
In this study, a repeatable and compatible interaction system between Meloidogyne incognita and tomato plants was firstly established by artificially inoculating sterilized second stage juvenile(J2) of M. incognita into root tips of 15-day tomato plant in vitro. Egg masses of female nematodes were obviously seen on root-knots after inoculation for 30 days at 27 °C in a growth chamber. Then, growth...
Vitamin E is a lip soluble vitamin synthesized only by photosynthetic organisms. Five key enzymes involved in this pathway, including HPPD, HPT, MPBQMT, TC and γ-TMT. To better understand the genetic control of vitamin E biosynthesis pathway in soybean, we searched the whole genome sequence of soybean by using Arabidopsis vitamin E biosynthesis enzyme as query sequences. A total of 24 genes were retrieved,...
Objective: To investigate the different expression of the rice receptor-like mRNA on nitrogen ion beam irradiated rice. Methods: Selected 3 groups ion beam irradiation rice seeds and untreated rice seed respectively, extracted their seedling total RNA after 96h germination at 30 °C, using Agilent gene chip screening different expressed genes of two groups rice seedlings. The chip contains 32323 mRNA...
Using tender stems of the current-year in 1-year-old Pinus massoniana as explants and exploiting orthogonal experiments, we optimized the growth conditions of P. massoniana in vitro and successfully obtained the induction buds. The results were that: (1) as explants, tender stems that cultured in GD media supplemented with 2.0 mg/L N6-benzyladenine (6-BA) and 0.05 mg/L alpha-naphthyl acetic acid (NAA)...
The aim of this research was to investigate the effects of exogenous NO on seed germination, seedling growth, and other physiological characteristics of Brassica napus under PEG stresses. The results indicate that the damages to Brassica napus caused by the stress of 10% PEG were significantly alleviated in the presence of 25µM SNP: the seed germination rate increased by 35.3%; the plant height, main...
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