Subtropical Plant Science

Accumulation Characteristics of 3 Ornamental Plants on Cadmium in Soil

CAI Xiao-dong,LIN Guang-rong,XU Wen-bao,CHEN Li-xuan

2011, 40(02): 4-6. DOI: 10.3969/j.issn.1009-7791.2011.02.002

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With three ornamental plants (Alocasia macrorrhiza, Nephrolepis cordifolia and Wedelia chinensis) as materials in pot-cultured experiment, their accumulation characteristics on Cadmium(Cd) in soil were studied. The results showed that three plants have different accumulation ability to Cd. The concentration of Cd in aboveground part and underground part had significant positive correlation with the content of Cd in soil (r＞0.9). The aboveground part of Wedelia chinensis had the strongest capability of accumulating Cd, with Alocasia macrorrhiza was secondly and Nephrolepis cordifolia was the weakest. Relatively, for their underground part, Alocasia macrorrhiza had the biggest content of Cd, Nephrolepis cordifolia secondly and Wedelia chinensis the lowest. When the content of Cd in soil came within 0～120 mg/kg, the roots accumulation coefficients of three plants were all greater than 1, which explained that their roots had the accumulation ability to Cd. Only Wedelia chinensis, whose accumulation coefficients of aboveground part and underground part were both above and beyond than 1, had the accumulation coefficient characteristics of over-accumulated plant. Therefore, Wedelia chinensis had some applied potential to soil restoration polluted by heavy metals Cd.

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Influence of Chromium Stress on Germination of Rice Seeds

YE Li-min,ZHANG Yu-wen,XIE Hua-mei

2011, 40(02): 7-9. DOI: 10.3969/j.issn.1009-7791.2011.02.003

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This paper studied the different concentrations of Cr6+ on germination of rice (‘Xieyougan 2’) seeds. The results showed that: the low concentration of chromium (≤10 mg/L) did not inhibited germination of rice seed; when the chromium concentration > 10 mg/L, the rice seed germination was inhibited. Influence of Cr6+ on rice seed germination rate was very small, but delayed germination time to some extent, the maximum inhibitory effect was the radicle growth.

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The Effect of Chromium Residue Leachate on the Micronuclei of Root Tip Cells of Vicia faba

LI Hong,ZHOU Ping

2011, 40(02): 10-13. DOI: 10.3969/j.issn.1009-7791.2011.02.004

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The mutagenicity of chromium residue leachate in root tip cells of Vicia faba was studied using micronucleus assay in this study. It was showed that chromium residue leachate contained high concentration of Cr6+, with strong genetoxic, and could induce the formation of micronuclei in root tip cells of Vicia faba obviously. At the Cr6+density of 186.6460mg/L, the micronucleus rate induced by chromium residue leachate reached the highest. There are very significant differences between the micronucleus rates induced by chromium residue leachate and that of negative control.

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Study on Genetic Variation of Superior Families of Pinus massiana in Guangdong and Guangxi

LIU Xi-hua,XING Jian-hong,YANG Guo,LIANG Yi-chi

2011, 40(02): 14-17. DOI: 10.3969/j.issn.1009-7791.2011.02.005

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Through investigating the growth of middle age of Pinus massiana forest, the genetic variation of population was analyzed. The result showed there were abundant genetic variation and very significant or significant differences among families of Pinus massiana in height, diameter breast-high, volume and crown, moreover, the differences were mainly controlled by genetic factors and these growth traits were genetically controlled in medium or lower level. Principal components analysis showed that height, diameter breast-high, volume and crown were principal components, the cumulative proportion of these three principal components achieved 89.54%. Using software Structure Version 2.2 to analyze the genetic structure of population, all families were divided into 5 groups. The group 4, including most families of Guangdong, had the most growth traits. The group 2, including most families of Guangxi, the growth traits was next to that of the group 4.

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Impacts to the Interspecies Association and Stability of Native Community Invaded by an Exotic Plant Conyza sumatrensis

GUO Lian-jin

2011, 40(02): 18-23. DOI: 10.3969/j.issn.1009-7791.2011.02.006

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Conyza sumatrensis is an exotic species in China, and it has affected the biodiversity, composition, structure and stability of native communities. The interspecific association of 12 primary species in native community invaded by C. sumatrensis and its’ stability were analyzed by Variance ratio, χ2 test and Jaccard index based on 2×2 contingency table and improved Godron M.’s measure, in the area of Shangrao City. The results showed that: (1) The whole native community not invaded by C. sumatrensis appears positive association. There are lots of positive association species-pairs, and also exist highly significant positive association species-pairs in the community. (2) The whole native community invaded by C. sumatrensis appears negative association, and significant negative association species-pairs appear in the community. The number of positive association species-pairs reduces sharply compared with before this, and lots of significant positive association species-pairs disappear. The competition of species increases in the invaded native community, and some species can not exist stably in disadvantage niche because of their weak competition. (3) Some species with close relation in local community are divided into two different ecological groups after C. sumatrensis invaded. (4) The stability of the native community reduces because of C. sumatrensis’s attack, 16 species in native community disappear gradually and 4 new species appear.

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Effects of Straw Mulching on Temporal Spatial Variation of Soil Temperature of Konjac Plantation in Yunnan Highland Region

DONG Guang-ping,LU Jun,GAO Xiangwu,DONG Kun,WANG Ying,GAO Xiao-jun,YIN Hui-qin,CHEN Wang-dong,PENG Lei

2011, 40(02): 24-26. DOI: 10.3969/j.issn.1009-7791.2011.02.007

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The effects of straw mulching on temporal spatial variation of soil temperature of konjac plantation in Yunnan highland region were studied for three years continuously. The results showed that the soil temperature presented a significant variation, which were coincident with the optimum temperatures of konjac at different stage of annual growth cycle. Straw mulching altered the nature of soil thermal exchanging layer (soil surface), meanwhile it had a double-side effect on slowing down the raise and the decline of soil temperature, with the regulation breadth increasing when air temperature increased or decreased. As a result, the temperature stability in same soil layer was enhanced. However, the regulation breadth decreased while soil depth increasing. Observation time showed a rule as: 13:00>19:00>7:00.

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Study on Fresh-keeping Agent of Rose Cutting Flowers

DAI Jian-li,XU Meng-ting

2011, 40(02): 27-29. DOI: 10.3969/j.issn.1009-7791.2011.02.008

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The sucrose (S), 8 - hydroxyquinoline (8-HQ) and citric acid (CA) were used as the basic formula of fresh-keeping solution, then with four different inorganic salts CaCl2, NaCl, Al2 (SO4)3, CaCl2 and KAl(SO4)2 individually to study the fresh-keeping technology of rose cutting flowers. The vase life span, flower diameter, water trimmed value, soluble protein and reducing sugar content were analyzed and discussed. The results showed that all the fresh-keeping solution could extend the vase life span of rose cutting flowers, increased the flower diameter and improved water metabolism, decreased the decomposition velocity of protein and sugar. Among them, the fresh-keeping solution 2% S +280 mg/L CA +200 mg/L 8-HQ +1% CaCl2 was the best.

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Studies on Anti-seasonal Cultivated Technique of Lotus

DENG Zhi-ping,DENG Run-tong,MO Zhong-kai,MO Ying-xin,ZHENG Zhi-bo,HUANG Zi-feng

2011, 40(02): 30-31. DOI: 10.3969/j.issn.1009-7791.2011.02.009

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Three cultivated varities of ornamental lotus were used to carry out anti-seasonal cultivated experiment in filmy warmhouse booth with regulable humiture in Dongguan City. At last, a suit of anti-seasonal cultivated technique of lotus which was fit for Dongguan region was obtained, and a great number of lotus bloomed at early December, which achieved the purpose that lotus in summer bloomed in winter and ornamental periods of lotus prolonged effectually.

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The Comparison of Nitrate and Vitamin C Contents in 5 Kinds of Common Wild Vegetables in Shangrao, Jiangxi Province

XU Fen-fen,WANG Fang,WANG Jian-guo,LUO Chun-hua,CUI Yan

2011, 40(02): 32-33. DOI: 10.3969/j.issn.1009-7791.2011.02.010

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The contents of nitrate and Vitamin C of 5 kinds of common wild vegetables including Rorippa dubia，Plantago asiatica，Portulaca oleracea，Lactuca indica，Oenanthe javanica. in Shangrao, Jiangxi Province were determined. The results showed that the nitrate contents differed greatly, and respectively were: 26.76 mg/kg, 77.66 mg/kg, 22.92 mg/kg, 70.99 mg/kg and 1.54 mg/kg. All of them did not exceed the FAO / WHO acceptable daily required amount (ADI). There was less difference existing in Vitamin C contents among 5 wild vegetables. The nitrate content of Oenanthe javanica was the lowest. Therefore, Oenanthe javanica had the largest value in use.

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Establishment of Tissue Culture and Rapid Propagation System of Armeniaca vulgaris ‘Badou’and Selection of Salt-tolerant Plant

DU Xue-ling,YU Ru-gang,SONG Yun-xian,ZHANG Zhen-xia

2011, 40(02): 34-38. DOI: 10.3969/j.issn.1009-7791.2011.02.011

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The stem of Armeniaca vulgaris ‘Badou’ was used as explants and MS as basic substrate to induce plant regeneration and select salt-tolerant plant. The results showed that the stem of ‘Badou’ in April and May sterilized by 0.1% mercury for 8min was suitable, the stem in MS culture medium with 1.0mg/L 6-BA and 0.1 mg/L IBA proliferated quickly and grew rushingly, the perfect rooting medium was MS+0.1 mg/L NAA + 0.2 mg/L IBA, with its rooting rate of 46.3%, and the optimum salt concentration in selection of salt-tolerant tissue culture seedlings was 0.4~0.8, there were also significant difference between plants selected and their contrast.

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The Effect of KT and 2,4-D on Redifferentiation of Anemarrhena asphodeloides Callus

YIN Ming-hua,WU Shao-xia

2011, 40(02): 39-41. DOI: 10.3969/j.issn.1009-7791.2011.02.012

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The effect of different concentrations of KT and 2,4-D on redifferentiation of Anemarrhena asphodeloides callus was studied. The results showed that the optimal regenerated shoot medium, the optimal seedling growth medium and the optimal proliferation medium of A. asphodeloides callus were all MS + KT 4.0 mg/L. The rooting of A. asphodeloides callus was both inhibited by using KT alone or using KT and 2, 4-D altogether.

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Technique for in vitro Rapid Propagation of Stem Buds of Anthurium andraeanum

CHEN Li-wen,HE Gui-zheng

2011, 40(02): 42-43. DOI: 10.3969/j.issn.1009-7791.2011.02.013

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The tender stem of Anthurium andraeanum was used as explants to study the effects of different growth regulators concentrations on the stem bud's germination, proliferation, rooting culture and the prevention of callus during proliferation culture. The results indicated that the optimal culture medium for stem bud inducement was MS + 6-BA 2.0 mg/L + NAA 0.5 mg/L, with the germination rate was 87.5%；the optimal culture medium for proliferation was MS + 6-BA0.8 mg/L + NAA 0.2 mg/L + VB2 8.0 mg/L, with the multiplication coefficient was 3.8; the optimal culture medium for rooting was 1/2MS + NAA0.5 mg/L, with the rooting rate was 98%; in addition, appropriate VB2 in proliferation medium could efficaciously prevent the form and differentiation of callus, thus reaching the goal that propagating buds by buds.

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The Influence of Culture Conditions on the Callus Induction of Cassia bicapsularis

LIU Zheng-lan,FENG Qiu-ping

2011, 40(02): 44-46. DOI: 10.3969/j.issn.1009-7791.2011.02.014

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The stem of Cassia bicapsularis test-tube plantlet was used as explants to advance comparative test of different culture conditions such as illumination, temperature, pH value and so on. The results indicated that the callus induction rate of Cassia bicapsularis was the highest, and sprout grew the best, on the conditions of 26℃ temperature, processed between 12h/d illumination and 12h/d darkness alternately, and pH 5.3.

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In vitro Culture of Red-skin Potato Seedlings and Induction of Micro-tuber

CHEN Qiao-ling,ZENG Li-hui

2011, 40(02): 47-49. DOI: 10.3969/j.issn.1009-7791.2011.02.015

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Red-skin potato is one of the important commercial crops which have promotional value in the current market. The shoots from tubers of red-skin potato were used as sterile materials to study the induction and proliferation of test-tube plantlet and micro-tuber of red-skin potato. The results showed that cultured in MS basal medium with 0.5 mg/L 6-BA, 0.17% activated carbon and 20 g/L sucrose for 30 days, the proliferation coefficient of test-tube plantlet was 8.6, and in MS basal medium with 0.5 mg/L 6-BA, 0.17% activated carbon and 100 g/L sucrose for 30 days, the induction rate of micro-tuber reached 62.5%. The average diameter of micro-tuber was 4.2 mm.

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The Seasonal Dynamics of Plant Communities in Wenzhou Invaded by Solidago Canadensis

MIAO Chong-chong,GUO Zhong-hai,JIN Sheng-ta,WANG Neng,DING Bing-yang

2011, 40(02): 50-54. DOI: 10.3969/j.issn.1009-7791.2011.02.016

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The fixed plot was set up in this field investigation to describe the seasonal dynamics of species composition and species diversity of the communities in Wenzhou City invaded by Solidago canadensis. The results showed that the species number in January and October were less than those in April and in July. The species of communities changed with seasonal variations. Most of the species existed transitorily in the community, with the top three species showing the vertical structure of certain niche difference. The dominant species also changed with seasonal variations. In two plots of Nanbao, Solidago canadensis was the dominant species or subdominant species (except October, due to human interference), showing that it had been in the stage of successful invasion. In three plots of Yangfushan, the important values ??of Solidago canadensis rised with seasonal variations, showing that it had been in the early settled stage of invasion beginning period.

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Scenic & Recreational Reconstruction Technology of Forest of Huai’an Mountain in Fuzhou City

LI Xiao-he,LAN Si-ren,DONG Jian-wen

2011, 40(02): 55-62. DOI: 10.3969/j.issn.1009-7791.2011.02.017

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Through the investigation on the existing scenery of Huai’an mountain in Fujian Agriculture and Forestry University, the conception of scenic & recreational management of forest landscape was introduced, and the functional characteristics of forest, on the basic of these aspects including aesthetics, health, culture education, safety and so on, to satisfy people’s requirements of scenic & recreational were analyzed. In addition, the scenic & recreational reconstruction principles of Huai’an mountain forest were proposed, and the specific reconstruction technique and measures were described from planting techniques, disposition mode, partition tree species selection and other aspects.

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Research on Application of Landscape Plants in Public Green Space of Center Towns in Guangzhou City

LU Li,HE Zhong-jian,DAI Se-ping,NIE Lei

2011, 40(02): 60-63. DOI: 10.3969/j.issn.1009-7791.2011.02.018

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In the foundation of investigating the application and species diversity of landscape plants in public green space of 17 center towns in Guangzhou, the current situation and existing questions of landscape plants’ application in public green space of center towns were summarized and analyzed in this paper, which could provide reference for tree species planning, regional green space construction of center towns in Chu Chiang Delta and their ecological system construction, sustainable development.

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The Exotic Resources of Tropical Fruit Trees and Their Landscape Application

CHEN Xin-hui

2011, 40(02): 64-67. DOI: 10.3969/j.issn.1009-7791.2011.02.019

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Based on the investigation of the exotic resources of tropical fruit trees introduced by Xiamen Overseas Chinese Subtropical Plant Introduction Garden from overseas since 1959, their growth and adaptability were reviewed. The ornamental value of all existing fruit trees was also evaluated, and some recommendations for landscape were presented.

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Tissue Culture and Rapid Propagation of Clematis ‘Gipsy Queen’

WU Rong,LIN Ping,FAN Guo-sheng,WANG Jin,CHEN Ze-ying

2011, 40(02): 68-69. DOI: 10.3969/j.issn.1009-7791.2011.02.020

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