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Frontiers in Biology

ISSN 1674-7984

ISSN 1674-7992(Online)

CN 11-5892/Q

Front Biol Chin    2009, Vol. 4 Issue (2) : 207-213    https://doi.org/10.1007/s11515-009-0007-8
RESEARCH ARTICLE
Study on the phenology of Chara vulgaris in Xin’an Spring, north China
Bianfang HU1,2, Shulian XIE1(), Jia FENG1, Meng ZHANG1
1. School of Life Science and Technology, Shanxi University, Taiyuan 030006, China; 2. Department of Biology, Jinzhong University, Jinzhong 030600, China
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Abstract

The phenology of Chara vulgaris was studied. The specimens were collected four times from April 2004 to January 2005 (one sampling per season). The water temperature, pH, dissolved oxygen, specific conductance, maximum width and maximum depth were monitored at every sampling time. Eighteen main morphological characteristics of the Chara vulgaris were also observed and measured under the microscope. The results showed that all the environmental factors had different seasonal patterns and some of the morphological characteristics had significant fluctuations, indicating differences in their seasonality. At the same time, some morphological characteristics were affected by the environmental parameters to some extent and the effect was primarily exhibited in its vegetative proportions; there was little effect on the sexual reproductive characteristics. Therefore, the relatively stable sexual reproductive characteristics can be used to identify the species.

Keywords Chara vulgaris      China      environmental factors      seasonal dynamics      Xin’an Spring     
Corresponding Author(s): XIE Shulian,Email:xiesl@sxu.edu.cn.   
Issue Date: 05 June 2009
 Cite this article:   
Bianfang HU,Shulian XIE,Jia FENG, et al. Study on the phenology of Chara vulgaris in Xin’an Spring, north China[J]. Front Biol Chin, 2009, 4(2): 207-213.
 URL:  
https://academic.hep.com.cn/fib/EN/10.1007/s11515-009-0007-8
https://academic.hep.com.cn/fib/EN/Y2009/V4/I2/207
Fig.1  Distribution of the sampling sites in Xin’an Spring
April 2004July 2004October 2004January 2005
water temperature/°C10.524.116.79
pH7.737.587.657.76
maximum depth/cm45454743
maximum width/m12121513
dissolved oxygen/mg·L-110.110.79.79.3
specific conductance/μS·cm-1966915916955
height of frond/cm, (n=5-10)24 ± 1.726 ± 2.728 ± 3.217 ± 2.4
diameter of stem/μm, (n=15)602 ± 87.2600 ± 100673 ± 104.5593 ± 172.3
length of internode/mm, (n =15)11 ± 2.118.9 ± 7.516.1 ± 4.225.1 ± 4.9
length of stipulode/μm, (n =15)131 ± 23.3119 ± 25.6147 ± 44.5170 ± 68.3
diameter of stipulode/μm, (n =15)76 ± 19.673 ± 14.270 ± 8.282 ± 19.3
diameter of cortex/μm, (n =15)40 ± 14.939 ± 14.558 ± 6.347 ± 10.3
length of spine-cell/μm, (n =15)63.5 ± 27.552.7 ± 18.689.3 ± 34.878.6 ± 29.4
length of branchlet/mm, (n =15)15.6 ± 5.517.7 ± 4.112.1 ± 2.615.8 ± 3.9
diameter of branchlet/μm, (n =15)414 ± 129.3384 ± 81.0239 ± 38.7303 ± 11.6
length of bracteoles/μm, (n =15)350 ± 45.2456 ± 58.6532 ± 67.9467 ± 36.3
length of bract-cell/μm, (n =15)1721± 1056.74120 ± 1206.31480 ± 260.41360 ± 345.2
diameter of antheridium/μm, (n =50)290 ± 45.3323.6 ± 71.0255.6 ± 116.2302.1 ± 59.4
diameter of oogonium/μm, (n =50)342.5 ± 42.2380.0 ± 84.7329.3 ± 53.4360.0 ± 66.0
length of oogonium/μm, (n =50)610 ± 116.3535 ± 81.8642.3 ± 121.5639.2 ± 114.8
number of convolutions, (n =50)11.9 ± 3.09.4 ± 1.712.3 ± 3.211.6 ± 2.4
diameter of oospore/μm, (n =50)263.8 ± 34.2294.3 ± 52.6254.2 ± 29.8276.5 ± 49.3
length of oospore/μm, (n =50)532.1 ± 47.8493.6 ± 32.4552.0 ± 63.2548.5 ± 54.8
number of stria, (n =50)10.3 ± 2.88.4 ± 0.711.8 ± 3.510.6 ± 2.4
Tab.1  Data of phenology of and environmental parameters in Xin’an Spring
Fig.2  
Fig.3  
Fig.4  
Fig.5  
Fig.6  
Fig.7  
Fig.8  Seasonal dynamics of morphological characteristics of in Xin’an Spring
Fig.9  Environmental variables during the sampling period in Xin’an Spring
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