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Allelopathic effects of extracts from Solidago canadensis L. against seed germination and seedling growth of some plants

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Journal of Environmental Sciences 2006年第2期18卷 304-309页

作者： SUN Bing-yao TAN Jian-zhong WAN Zhi-gang GU Fu-gen ZHU Ming-de College of Life Sciences Suzhou University Suzhou 215123 China School of Urbanology Suzhou University Suzhou 215123 China

To investigate the potential role of allelopathy in plant interference and in the successful invasion of alien species Solidago canadensis, aqueous and ethanolic extracts from rhizomes, stems and leaves of S. canadensis were prepared and used as treatment solutions to assess their effects on seed germination and seedling growth in four target species, mulberry （Morus alba）; morning glory （Pharbitis nil）, wheat （Triticum aestivum） and rape （Brassiea campestris）. Reduction and/or growth in germination and growth of the target plant species in the presence of both aqueous and ethanolic extracts at different concentrations indicated that the responses were species-specific and concentration-dependent. Generally, ethanolic extracts （especially from leaves） imposed stronger effects on both seed germination and seedling growth. Extracts with lower concentration at 0.001 g/ml dw could stimulate the seedling growth of rape and morning glory, whereas extracts at any given concentrations have inhibitory effects on wheat and mulberry. It is suggested that the aqueous and ethanolic extracts of all the three parts of S. canadensis have significant allelopathic effects. Although both inhibition and stimulation occurred in the germination and growth of the target species, extracts with higher concentrations definitely inhibit seed germination and seedling growth of all target plants. We suggest that allelopathy plays a more important role than other mechanisms do in the out-competition ofS. canadensis over other plants, and make it invasive in new habitats.

关键词： Canada goldenrod(Solidago cancutensis L.) allelopathy extracts seed germination seedling growth

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Effect of La^(3+) on seed germination and seedling growth of Salvia miltiorrhiza

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Journal of Rare Earths 2018年第8期36卷 898-902页

作者： Qingxin Sun Liangyue Sun Shangcai Feng Shaofen Guo College of Pharmacy Guangdong Pharmaceutical University College of Pharmacy Linyi University

The purpose of this study is to determine the effect of La^3＋ solution on seed germination and seedling growth of Salvia miltiorrhiza. Different concentrations of La^3＋ were used on seed by soaking treated to determine which concentration is the most suitable for the growth of S. miltiorrhiza. Results show that the low concentration of La^3＋ displays the promotion effect on S. miltiorrhiza seed germination rate and germination potential, and the promotion effect reaches the highest level when the concentration of La^3＋solution is 30 mg/L, the germination index and vigor index are the highest in 20 mg/L, and it can also increase the contents of soluble sugar, soluble protein and chlorophyll. Meanwhile, the activity of antioxidant enzyme system（CAT and SOD） are improved, thus the photosynthesis and resistance of plant are enhanced. On the contrary, when the La^3＋ concentration is high, La^3＋ can inhibit plant growth. Thus La^3＋ displays the ＂homesis effect＂ on S. miltiorrhiza growth.

关键词： Salvia miltiorrhiza La^3+ Seed germination seedling growth Rare earths

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BEAR1, a bHLH transcription factor, controls seedling growth by regulating gibberellins biosynthesis in rice

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The Crop Journal 2023年第3期11卷 744-755页

作者： Yantong Teng Maohong Cai Qinyu Xie Qinglong Liu Haiwen Zhang Tao Chen Zhejiang Provincial Key Laboratory for Genetic Improvement and Quality Control of Medicinal Plants College of Life and Environmental ScienceHangzhou Normal UniversityHangzhou 311121ZhejiangChina College of Life Sciences Inner Mongolia UniversityHohhot 010021Inner MongoliaChina Institute of Crop and Nuclear Technology Utilization Zhejiang Academy of Agricultural SciencesHangzhou 310021ZhejiangChina Biotechnology Research Institute Chinese Academy of Agricultural SciencesBeijing 100081China

The genetic pathways of rice seedling growth have a major impact on seedling emergence from soil and *** this study,we identified a new bHLH transcription factor,BEAR1,from rice RNAi mutant *** the BEAR1-RNAi and bear1 CRISPR mutants had accelerated seedling *** section of leaves showed accelerated development of lacuna and vascular bundles in bear1 *** staining revealed that BEAR1 was highly expressed in coleoptiles and leaves at seedling *** analysis of gibberellin(GA)biosynthesis and metabolic genes and content determination of active GAs indicated that the expression of GA biosynthesis genes,especially OsKS4 and OsCPS2,were upregulated and the GAs content were significantly increased in bear1,which correlated with the seedling phenotype of bear1 *** and biochemical assays revealed that BEAR1 directly binds to the promoter of OsKS4,thereby repressing its *** analysis showed clear differentiation in indica and japonica rice varieties,and a strong correlation with seedling *** findings provide novel insights into the regulation of seedling growth in rice.

关键词： Rice BEAR1 seedling growth Gibberellins OsKS4

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ZmDRR206 functions in maintaining cell wall integrity during maize seedling growth and defense response to external stresses

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The Crop Journal 2023年第6期11卷 1649-1664页

作者： Tao Zhong Suining Deng Mang Zhu Xingming Fan Mingliang Xu Jianrong Ye National Maize Improvement Center/Center for Crop Functional Genomics and Molecular Breeding China Agricultural UniversityBeijing 100193China Institute Food Crops Yunnan Academy of Agricultural SciencesKunming 650205YunnanChina

Plants adaptively change their cell wall composition and structure during their growth,development,and interactions with environmental *** proteins(DIRs)contribute to environmental adaptations by dynamically reorganizing the cell wall and/or by generating defense compounds.A maize DIR,ZmDRR206,was previously reported to play a dominant role in regulation of storage nutrient accumulation in endosperm during maize kernel *** we show that ZmDRR206 mediates maize seedling growth and disease resistance by coordinately regulating biosynthesis of cell wall components for cell-wall integrity(CWI)*** of ZmDRR206 was induced in maize seedlings upon pathogen ***206 overexpression in maize resulted in reduced seedling growth and photosynthetic activity but increased disease resistance and drought tolerance,revealing a tradeoff between growth and ***,ZmDRR206 overexpression reduced the contents of primary metabolites and down-regulated genes involved in photosynthesis,while increasing the contents of major cell wall components,defense phytohormones,and defense metabolites,and up-regulated genes involved in defense and cell-wall biosynthesis in ***206-overexpressing seedlings were resistant to cell-wall stress imposed by isoxaben,and ZmDRR206 physically interacted with ZmCesA10,which is a cellulose synthase *** findings suggest a mechanism by which ZmDRR206 coordinately regulates biosynthesis of cell-wall components for CWI maintenance during maize seedling growth,and might be exploited for breeding strong disease resistance in maize.

关键词： Cell-wall integrity Cell-wall biosynthesis Dirigent protein ZmDRR206 Defense response seedling growth

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Allelopathic potential of Rhus chinensis on seedling growth of radish,semen cassiae and black soyabean

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Journal of Forestry Research 2015年第2期26卷 273-279页

作者： Long-yuan Liu Hong-zhi He Shi-ming Luo Hua-shou Li School of Chemistry and Chemical Engineering Guangdong Pharmaceutical University Key Laboratory of Tropical Agricultural Environment in South China the Ministry of AgriculturePeople’s Republic of ChinaSouth China Agricultural University

The allelopathic potential of Rhus chinensis Mill on seedling growth of radish（Raphanus sativus L.）,semen cassiae（seed of Cassia obtusifolia L.） and black soyabean [Glycine max（L.） Merr.] was investigated under laboratory *** water extracts of seed,leaf and bark of *** inhibited the germination and the growth of roots and shoots of radish,semen cassiae,and black *** increasing reductions in the germination and growth of roots and shoots were observed as the concentration of water extract increased in all *** order of allelopathic potentials of the three parts from *** plant on seed germination of these receptors was leaf [ seed [ ***,the inhibition of water extracts from *** seed on root activity of semen cassiae was more severe than from the other two *** allelopathic potential on the germination of radish was higher than that of black soyabean and semen *** integrated effect index for allelopathic potential of water extracts of leaf of *** on radish,semen cassiae and black soyabean seedling growth were-0.88,-0.93 and-0.98 *** results suggested that it is important to minimize the negative allelopathic potential of *** in agroforestry systems,and to exploit this traditional Chinese medicinal tree for the production of natural bio-pesticides.

关键词： Allelopathy Rhus chinensis Water extracts seedling growth

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Magnetically treated water irrigation effect on turnip seed germination,seedling growth and enzymatic activities

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Information Processing in Agriculture 2016年第2期3卷 99-106页

作者： Zia ul Haq Munawar Iqbal Yasir Jamil Hafeez Anwar Ayesha Younis Muhammad Arif M.Zeshan Fareed Fida Hussain Department of Physics University of AgricultureFaisalabad 38040Pakistan Department of Chemistry Qurtuba University of Science and Information TechnologyPeshawar 25100KPKPakistan Laser Spectroscopy Lab Department of PhysicsUniversity of AgricultureFaisalabad 38040Pakistan Department of Mathematics and Statistics University of AgricultureFaisalabad 38040Pakistan Department of Botany Islamia CollegePeshawar 25100Pakistan

Pre-sowing magnetic field seed treatment effects on biological characteristics of vegetables and crops have been studied ***,studies reporting irrigation with magnetically treated water are ***,the effect of irrigation with magnetically treated water on turnip seed germination,seedling growth and enzymatic activities was *** tap water was treated at 211 mT for 30,45 and 60 min and used for irrigation of turnip seed and *** and healthy turnip seed was sown under randomized complete block design(RCBD).The germination,emergence rate index,vigor index I and vigor index II increased up to 28.33%,11.54%,57.59%and 32.26%,*** growth parameters such as seedling lengths,fresh&dry weights,chlorophyll content were also enhanced in response of irrigation with magnetically treated *** seedlings irrigated with magnetically treated water showed 28.92%,11.36%and 14.76%higher protein content,alpha amylase and protease activities,respectively vs *** revealed that irrigation with magnetically treated water has potential to improve turnip germination,seedling growth and enzymatic activities and this study is also extendable to other vegetables and crops for the improvement of germination and growth.

关键词： Turnip Brassica rapa L. Magnetically treated water seedling growth Biochemicals

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Effect of cold plasma treatment on seedling growth and nutrient absorption of tomato

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Plasma Science and Technology 2018年第4期20卷 47-50页

作者：蒋佳峰李建刚董元华 Institute of Botany Jiangsu Province and Chinese Academy of Sciences State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences

The effects of cold plasma(CP) treatment on seed germination, seedling growth, root morphology, and nutrient uptake of a tomato were investigated. The results showed that 80 W of CP treatment significantly increased tomato nitrogen(N) and phosphorus(P) absorption by12.7% and 19.1%, respectively. CP treatment significantly improved the germination potential of tomato seed by 11.1% and the germination rate by 13.8%. seedling growth characteristics,including total dry weight, root dry weight, root shoot rate, and leaf area, significantly increased after 80 W of CP treatment. Root activity was increased by 15.7% with 80 W of CP treatment,and 12.6% with 100 W of CP treatment. CP treatment(80 W) markedly ameliorated tomato root morphology, and root length, surface area, and volume, which increased 21.3%, 23.6%, and29.0%, respectively. Our results suggested that CP treatment improved tomato N and P absorption by promoting the accumulation of shoot and root biomass, increasing the leaf area and root activity, and improving the length, surface area, and volume of root growth. Thus, CP treatment could be used in an ameliorative way to improve tomato nutrient absorption.

关键词： cold plasma tomato nutrient uptake seedling growth root morphology

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Effect of electrostatic field on seed germination and seedling growth of Sorbus pohuashanesis

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Journal of Forestry Research 2011年第1期22卷 27-34页

作者： YANG Ling SHEN Hai-long School of Forestry Ministry of Education Key Laboratory of ForestTree Genetic Improvement and Biotechnology Northeast Forestry University Harbin 150040 China.

A study was conducted to determine the effects of electrostatic field （ESF） treatment on seed germination and seedling growth of Sorbus pohuashanesis. The experiments were arranged by uniform design computed by the Data Processing System （DPS）, including three levels of seeds soaking time, four levels of ESF intensity and four levels of ESF treatment time, with 12 treatments. Ten seeds were used in each treatment with three replicates. Seed vigor, seed germinating ability, emergence rate of seedling, survival rate of seedling, and seedling height and diameter, as well as the change in activities of superoxide dismutase （SOD）, soluble protein contents, total chlorophyll contents, soluble total sugar contents in leaves of S. pohuashanensis seedlings were measured after ESF treatments. The experiment results show that ESF treatment could improve the water absorption ability of dry seeds of S. pohuashanensis, resulting in fast germination at room temperature under light conditions. Combined treatment of ESF with cold stratification could increase seed germination percentage significantly （to 42.20%）, promote seedling height growth, affect leaf SOD activity, and could raise contents of total chlorophyll, soluble protein, and total soluble sugar in leaves. Seed soaking time had a significant effect on seed relative electroconductivity, seed germination under light, SOD activity, soluble protein content and total soluble sugar content of seedling leaves. ESF intensity exerted a moderate effect on these indexes. ESF treatment time only had significant effect on total chlorophyll contents, no evident effect on other indexes.

关键词： Sorbus pohuashanesis seed germination seedling growth electrostatic treatment

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Nursery practice on seed germination and seedling growth of Dalbergia sissoo using beneficial microbial inoculants

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Journal of Forestry Research 2011年第2期22卷 189-192页

作者： B.M.Khan M.K.Hossain M.A.U.Mridha Institute of Forestry and Environmental Sciences University of ChittagongChittagong-4331Bangladesh Department of Botany University of Chittagong

Nursery practice using microbial inoculants was performed to find out the efficacy of the inoculants on seed germination and seedling growth of sissoo（Dalbergia sissoo Roxb.）.Microbial inoculants or effective microorganisms（EM） are a mixture of many different beneficial microorganisms in a *** seedlings were grown in a mixture of sandy soil and cowdung（3：1） kept in polybags with pouring EM solution at different concentrations（0.1%,0.5%,1%,2%,5% and 10%） before and after a week of sowing the *** germination rate and growth parameters of seedlings were measured,such as,shoot and root length,vigor index,fresh and dry weight of shoot and root and total biomass *** nodulation status influenced by EM was also observed along with the measurement of pigment contents in *** highest germination rate（69%） was observed in 2% EM treatment,followed by 67% and 65% in 1% and 5% *** highest shoot length（33.2 cm） was in 2% EM,whereas highest root length（26.3 cm） was in 1% *** fresh and dry weights from shoot and root,were maximum（4.16 g and 1.57 g;2.12 g and 0.83 g respectively） in 2% EM and were significantly（p ≤ 0.05） different from *** index was highest（4071） in 2% EM,which was significantly（p ≤ 0.05） different from *** dry weight increment was highest in 2% EM treatment,followed by 1% and 5% concentrations of *** number was higher at very low（0.1%） concentration of EM solution but it normally decreased with the increase of EM *** contents of chlorophyll a,chlorophyll b and carotenoid were highest（60.11,17.05 and 42.48 mg·L1respectively） in 2% EM treatment and lowest（39.35,13.55 and 27.29 mg·L-1 respectively） in control ***,low concentration of EM（up to 2%） can be used for getting maximum seed germination rate and seedling development of Dalbergia sissoo Roxb.

关键词： Dalbergia sissoo Roxb. microbial inoculants(EM) germination rate seedling growth leaf's pigment nodulation status

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seedling growth of Cassia tora, Cassia occidentalis and Cassia sophera in Relation to Salinity and pH

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Journal of Agricultural Science and Technology(A) 2015年第7期5卷 601-607页

作者： Sabiha Sultana A.K.M. Nazrul Islam Ecology and Environment Laboratory Department of Botany University of Dhaka Dhaka 1000 Bangladesh

The paper aimed to investigate the growth of seedlings of three species of Cassia （C tora, C. sophera and C occidentalis） at different concentrations of salinity （NaC1） and pH treatments. All the species showed the highest seedling length under control condition, and with the increase of salinity, C occidentalis showed the highest sensitivity. The seedling length of C tora at 0.05 M NaCI significantly （P = 0.05） decreased to 5.71 cm, and further increase of salinity to 0.1 M, the seedling length was decreased to less than the value of 0.05 M NaC1 treatment and one-third （2.15 cm） of that of control （6.92 cm）. Seeds of all the species failed to germinate at 0.5 M NaC1. Scarified seeds of C. sophera and C occidentalis increased seedling length. The highest seedling length was in C. sophera, followed by C. tora and C. occidentalis. All the species showed significant decrease （P 〈 0.05） of fresh weight with the increase of salinity; scarification of seeds in C. occidentalis and C. sophera showed higher fresh weight than those of without scarification. Experiments at different pH levels did not show any significant （P = 0.05） change in seedling length, except C. sophera, while at acidic pH, both seedling length and dry weight were significantly （P 〈 0.05） decreased.

关键词： Cassia spp. seedling growth salinity pH.

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