Sexual Reproduction and Plasticity Analysis of Two Ecotypes Leymus chinensis on Heterogeneity Soil

2014 ◽  
Vol 522-524 ◽  
pp. 450-453
Author(s):  
Chan Zhou ◽  
Zhuo Zhang ◽  
Shuo Zhang ◽  
Yun Fei Yang
Keyword(s):  
Sexual Reproduction ◽  
Sandy Soil ◽  
Significance Test ◽  
Leymus Chinensis ◽  
Seed Setting ◽  
Alkali Soil ◽  
Reproduction Strategy ◽  
Strategy Condition ◽  
Seed Setting Percentage ◽  
Soil Habitat

Characteristics of sexual reproduction of two L. chinensis ecotypes under saline-alkali soil and sandy soil habitats on Songnen plain were studied, such as number of florets, number of grains, seed-setting percentage and the weight of thousand grains. The results showed that number of florets, number of grains, seed-setting percentage and the weight of thousand grains of two L. chinensis ecotypes fluctuated at some range. Variation coefficients of number of florets, number of grains and seed-setting percentage were 34.63%, 79.37% and 87.2% higher, but variation coefficient of the weight of thousand grains was lower. Number of grains and seed-setting percentage of two L. chinensis ecotypes under saline-alkali soil habitat were lower than those under sandy soil habitat. Significance test showed that number of florets and seed-setting percentage of two L. chinensis ecotypes, number of grains of grey-green ecotypes L. chinensis and the weight of thousand grains of yellow-green ecotype L. chinensis between saline-alkali soil habitat and sandy soil habitat were significant or very significant. Number of florets and the weight of thousand grains between two L. chinensis ecotypes under the same habitat were significant or very significant. In results, adaptation of sexual reproduction of two L. chinensis ecotype populations on habitat was stronger. The two ecotypes adopt the same adaptable reproduction strategy. Condition change arose plasticity feedback of characteristics of sexual reproduction. And individual difference in population under the same habitat was results by microhabitat difference.

Characteristics of Seed-Setting of Two Ecotypes Leymus chinensis on Heterogeneity Soil

2014 ◽  
Vol 522-524 ◽  
pp. 1076-1079
Author(s):  
Chan Zhou ◽  
Jun Feng Zhu ◽  
Hui Liang ◽  
Zhuo Zhang ◽  
Yun Fei Yang
Keyword(s):  
Sandy Soil ◽  
Significance Test ◽  
Leymus Chinensis ◽  
Seed Setting ◽  
Grain Number ◽  
Alkali Soil ◽  
Reproduction Strategy ◽  
Single Spike ◽  
Seed Setting Percentage ◽  
Soil Habitat

Characteristics of seed-setting of two Leymus chinensisecotypes under saline-alkali soil and sandy soil habitats on Songnen plain were studied, such as number of grains and seed-setting percentage. The results showed that number of grains and seed-setting percentage of two L. chinensisecotypes fluctuated within a certain range. Variation coefficients of single spike grain number and seed-setting percentage were 79.37% and 87.2% higher. The number of grains and seed-setting percentage of two L. chinensisecotypes under saline-alkali soil habitat were lower than those under sandy soil habitat. Significance test showed that seed-setting percentage of two L. chinensisecotypes, and the single spike grain number of grey-green L. chinensisecotypes between saline-alkali soil habitat and sandy soil habitat were significant or very significant. In results, the sexual reproduction of two L. chinensisecotype populations had a stronger adaptation for the habitats, the two ecotypes take the same adaptable reproduction strategy, due to the change of habitat condition, the characteristics of seed-setting have a plastic changes accordingly, and individual difference in population under the same habitat was resulted by microhabitat differences.

A NEW CHEMICAL BRASSINOLIDE IN COMBINATION WITH FERTILIZER LEVELS TO IMPROVE THE SEED SETTING PERCENTAGE IN SUNFLOWER

2000 ◽  
Vol 48 (2) ◽  
pp. 171-176 ◽  
Author(s):  
C. Chinnamuthu ◽  
A. Sivamurugan ◽  
A. Balasubramanian
Keyword(s):  
Tamil Nadu ◽  
Field Experiments ◽  
Seed Setting ◽  
Yield Attributes ◽  
South West Monsoon ◽  
Hand Pollination ◽  
Poor Seed ◽  
Plant Growth Promoting ◽  
Opening Stage ◽  
Seed Setting Percentage

Poor seed set and filling is one of the most common problems encountered in sunflower cultivation. The yield of sunflower could be increased to a considerable extent by using brassinolide, a plant growth promoting substance, isolated from the pollen of rape, which prevents the formation of empty achenes, thus increasing the number of filled seeds. Field experiments were carried out at Tamil Nadu Agricultural University, Coimbatore, India during the summer (March–May) and South West Monsoon (June– September) seasons of 1997 to study the effect of brassinolide and NPK levels on the yield and yield attributes of sunflower. The experiments were laid out in a split plot design. The main plots were treated with five levels of fertilizer (N:P:K), namely 40:20:20, 50:25:25, 60:30:30, 70:35:35 and 80:40:40 kg ha -1, while the subplots consisted of seed setting treatments: hand pollination, 0.2% borax + 2% diammonium phosphate spray and 1 ppm brassinolide spray at the ray floret opening stage, together with a control. Yield attributes: head diameter, number of seeds head –1, seed filling percentage and 100 seed weight, were significantly influenced by NPK levels. Among the seed setting treatments, brassinsolide 1 ppm spray at the ray floret opening stage was found to be superior in enhancing the seed setting percentage. The application of N:P:K at 80:40:40 kg ha –1 was found to be optimum for higher seed yield in sunflower.

Effects of mowing disturbance and competition on spatial expansion of the clonal plant Leymus chinensis into saline-alkali soil patches

2019 ◽  
Vol 168 ◽  
pp. 103890 ◽  
Author(s):  
Jianyong Wang ◽  
Iram Abdullah ◽  
Tongtong Xu ◽  
Wanyue Zhu ◽  
Ying Gao ◽  
...  
Keyword(s):  
Clonal Plant ◽  
Leymus Chinensis ◽  
Spatial Expansion ◽  
Alkali Soil

scholarly journals De novo assembly of expressed transcripts and analysis of pistil to identify genes involved in early stage of pollination in Liriodendron chinense

2017 ◽  
Author(s):  
Ming Li ◽  
Kun Wang ◽  
Rebecca Njeri Damaris ◽  
Pingfang Yang
Keyword(s):  
Pollen Tube ◽  
Sexual Reproduction ◽  
Differentially Expressed Genes ◽  
De Novo ◽  
Early Stage ◽  
Average Length ◽  
Differentially Expressed ◽  
Seed Setting ◽  
Sequencing Data ◽  
Liriodendron Chinense

Plant sexual reproduction is a complicated and a key biological process with profuse interactions between pollen and pistil. This process determines whether fertilization will be successful or not and thus affect the seed setting. To explore the reason why L. chinense has a low seed setting ratio, transcriptome analysis on pistils of L. chinense during pollination were conducted. After analyzing the sequencing data, 206,858 unigenes with an average length of 646 bp were generated using the assembled transcripts. Among total unigenes, 3844 genes which expression fold change during early stage of pollination was higher or lower than 10 were selected as significant differentially expressed genes. 54 differentially expressed genes involved in sexual reproduction processes including the regulation of pollen tube growth process and double fertilization process might be partially causing the low seed setting in L. chinense. These results indicated that the barrier between pollen tube and pistil might be the reason why L. chinense have low seed setting. This study might be helpful to understand why L. chinense has such a low seed setting ratio.

scholarly journals De novo assembly of expressed transcripts and analysis of pistil to identify genes involved in early stage of pollination in Liriodendron chinense

2017 ◽  
Author(s):  
Ming Li ◽  
Kun Wang ◽  
Rebecca Njeri Damaris ◽  
Pingfang Yang
Keyword(s):  
Pollen Tube ◽  
Sexual Reproduction ◽  
Differentially Expressed Genes ◽  
De Novo ◽  
Early Stage ◽  
Average Length ◽  
Differentially Expressed ◽  
Seed Setting ◽  
Sequencing Data ◽  
Liriodendron Chinense

Plant sexual reproduction is a complicated and a key biological process with profuse interactions between pollen and pistil. This process determines whether fertilization will be successful or not and thus affect the seed setting. To explore the reason why L. chinense has a low seed setting ratio, transcriptome analysis on pistils of L. chinense during pollination were conducted. After analyzing the sequencing data, 206,858 unigenes with an average length of 646 bp were generated using the assembled transcripts. Among total unigenes, 3844 genes which expression fold change during early stage of pollination was higher or lower than 10 were selected as significant differentially expressed genes. 54 differentially expressed genes involved in sexual reproduction processes including the regulation of pollen tube growth process and double fertilization process might be partially causing the low seed setting in L. chinense. These results indicated that the barrier between pollen tube and pistil might be the reason why L. chinense have low seed setting. This study might be helpful to understand why L. chinense has such a low seed setting ratio.

scholarly journals Ecological Stoichiometry Homeostasis of Six Microelements in Leymus chinensis Growing in Soda Saline-Alkali Soil

2020 ◽  
Vol 12 (10) ◽  
pp. 4226 ◽  
Author(s):  
Yuefen Li ◽  
Heyang Gong ◽  
Shujie Li ◽  
Yushu Zhang
Keyword(s):  
Soil Ph ◽  
Ecological Stoichiometry ◽  
Soil Salinization ◽  
Total Alkalinity ◽  
Leymus Chinensis ◽  
Zn Deficiency ◽  
Alkali Soil ◽  
Grassland Ecosystems ◽  
Severe Impairment ◽  
Soil Zn

Soil salinization poses severe threats to grassland ecosystems in various parts of the world, including the Songnen Plain in northeast China. Severe impairment of plant growth in this soil is generally attributed to high soil pH, total alkalinity, and sodium (Na) contents. This paper focuses on the ecological stoichiometry of microelements, which has received much less attention than relations of macroelements, in the soil and plants (specifically Leymus chinensis) growing in it. The results show that the soil’s manganese (Mn), zinc (Zn), iron (Fe), copper (Cu), nickel (Ni) and molybdenum (Mo) contents are lower than average in Chinese soils, but only Mn and Zn are severely deficient in L. chinensis. With increases in soil pH, total alkalinity, and Na, the Mo contents in both soil and L. chinensis slightly increase, while contents of the other microelements decline. Homeostasis indices obtained for the six microelements—and Fe/Zn, Fe/Ni, Fe/Cu, and Cu/Zn ratios—were all between 0.82 and 3.34 (ranging from just below the “plastic” threshold to “weakly homeostatic”). Despite Zn deficiency in the soil, Zn appears to have the highest homeostasis of the six elements in L. chinensis (homeostasis indices of Zn, Cu, Ni, Mn, Fe and Mo were 3.34, 2.54, 1.86, 1.76, 1.52, and 1.33, respectively). In addition, the Cu/Zn ratio had the highest homeostasis index (1.85), followed by Fe/Zn (1.02), Fe/Cu (0.95) and Fe/Ni (0.82). Appropriate application of Mn and Zn fertilizers is recommended to promote the growth and development of L. chinensis in soda saline-alkali soil.

scholarly journals Leymus chinensis Tolerates Mowing Disturbance by Maintaining Photosynthesis in Saline-Alkali Heterogeneous Habitats

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Nan Lu ◽  
Luhao Qu ◽  
Jun Liu ◽  
Jiyun Yang ◽  
Long Bai ◽  
...  
Keyword(s):  
Clonal Plant ◽  
Economic Benefits ◽  
Leymus Chinensis ◽  
Soil Conditions ◽  
Alkali Soil ◽  
Heterogeneous Habitats ◽  
Relative Water ◽  
Plant Photosynthesis ◽  
Use Efficiency ◽  
Strong Disturbance

Leymus chinensis is a perennial rhizomatous clonal plant with strong tolerance to mowing, grazing, drought, and salt-alkali. However, with patchy soil environment, how mowing affect the photosynthesis of L. chinensis in heterogeneous patches is largely unknown. In this experiment, we tested the effects of mowing intensity (0, 35%, and 70% removal of aboveground biomass) on plant photosynthesis under different heterogeneous patches with different saline-alkali soil. We found that moderate concentrations of salt-alkali under heterogeneous patches have no significant effect on the photosynthesis of L. chinensis. Moderate mowing can maintain photosynthesis under no heterogeneity soil and moderate salt-alkali patch condition. In addition, heavy mowing and high salt-alkali soil under heterogeneous patches both inhibited net photosynthetic rate (PN) and transpiration rate (E), reduced leaf area, and plant height. L. chinensis responded to extreme soil conditions and strong disturbance by increasing water-use efficiency (WUE), reducing relative water content (RWC), and changing stomatal conductance (Gsw). Therefore, our results imply that moderate grazing or mowing can be used to maintain the productivity and economic benefits of grassland when the soil heterogeneous patches with moderate saline-alkali conditions.

Sign in / Sign up

Export Citation Format

Share Document