Archive

30 August 2022, Volume 51 Issue 4 Previous Issue    Next Issue
---
Plant physiology, biochemistry and molecular biology
Plant ecology, resources and taxonomy


For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Plant physiology, biochemistry and molecular biology

Select

Changes of Major Terpenoids Contents and Related Genes’ Expression Level in Jasmine after GA3 Treatment ZHAO Wei-shu, WAN Chao, HU Li, ZHANG Qu, YUAN Yuan 2022, 51(4): 241-247.  DOI: 10.3969/j.issn.1009-7791.2022.04.001 Abstract ( )   PDF (721KB) ( )   In this study, 100 μmol·L–1 gibberellin (GA3) was used to spray jasmine, and its effects on the main aroma components of jasmine and the expression levels of aroma synthesis-related structural genes and transcription factors were analyzed. The results showed that external GA3 could increase the total aroma components and the contents of linalool and farnesene during the blooming process, and make the peaks of total aroma components and farnesene content earlier during the blooming process. GA3 treatment increased the expression peaks of JsTPS2, JsTPS3, and JsTPS4 genes during flower opening, while the expression level of JsTPS1 decreased. After external application of GA3, the expression levels of floral aroma-related transcription factors JsMYB305, JsMYB86, and JsMYB108 increased during flower opening. The expression level of JsMYC2 decreased during flower opening, while the expression level of JsbHLH13 increased. The research results could provide a theoretical reference for improving the aroma of jasmine through plant growth regulators. References | Related Articles | Metrics

Select

Histological Observation on the Germination of Lilium laneifolium Bulbil ZHANG Li-ying, RAN Jiang-miao, GUO Yue-yi, LI Jing-shi, DONGFANG Yang, GUO Xue-min 2022, 51(4): 248-255.  DOI: 10.3969/j.issn.1009-7791.2022.04.002 Abstract ( )   PDF (400KB) ( )   To provide data for the in-depth study of bulbil propagation biology of Lilium laneifolium, taking the bulbils as experimental materials, the morphology and structure of each part of bulbils were observed by field investigation, paraffin section, freehand section, and segregation process, and the contents of anthocyanin and photosynthetic pigments were measured among each scale leaf by spectrophotometry. Bulbils were composed of scale leaves, bulb and adventitious root, in which outer epidermis cells had developed cuticle; 1–2 layers of mesophyll cells inside the outer epidermis contained anthocyanins, all mesophyll cells contained chloroamyloplasts; the chloroamyloplasts at the base of the 1st–3rd scale leaves were concentrated in the direction of adventitious root elongation, the pigment contents of scale leaves gradually decreased from outside to inside, and scale leaf bundles belonged to collateral vascular bundles. The bulb was mainly composed of cortex and vascular column, in which the upper end of the bulb included the apical meristem and apical bud sheath, while at the lower end of the bulb, some cells underwent programmed death, and yet no abscission layer similar to that at the base of petiole during leaf abscission was found. The adventitious root originated from the cortical cells of the bulb part around which the base of the second scale leaf was borne, and the adventitious root was separated from the surrounding scale leaf tissue. During the process of bulbil germination, the material supply of scale leaf appeared differentiation phenomenon. These results provided a structural basis for the study on biological mechanism of the bulbil propagation of L. laneifolium. References | Related Articles | Metrics

Select

Heat Resistance Analysis of Six Species of Camellia Based on Leaf Anatomy CHEN Zi-luan, SU Dan-ping, HE Tao, ZHANG Chao, CHEN Duo-ying, LI Wei 2022, 51(4): 256-263.  DOI: 10.3969/j.issn.1009-7791.2022.04.003 Abstract ( )   PDF (289KB) ( )   The leaves of six species of Camellia were studied anatomically by paraffin sections technique. The indicators were screened by cluster analysis and correlation analysis, and the heat resistance of Camellia plants was evaluated by affiliation function method. The results showed that the leaves of six species of Camellia were all heterogeneous. The upper and lower epidermis of leaves consisted of one layer of cells arranged closely. The leaf flesh tissue contained crystals and irregular stone cells, and the fenestrated tissue consisted of one to three layers of long cylindrical cells and contained a large number of chloroplasts. The main indicators affecting the heat resistance of these Camellia plants were leaf thickness, fenestrated tissue/sponge tissue, cuticle thickness, and tissue laxity. Based on heat resistance from strong to weak, order of six species of Camellia was C. semiserrata var. magnocarpa, C. mongshanica, C. mairei var. lapidea, C. caudata, C. edithae, C. crapnelliana. According to the type of heat resistance, These Camellia plants could be divided into three categories: C. semiserrata var. magnocarpa was heat-resistant; C. mongshanica was medium heat-resistant; other 4 plants were low heat-resistant. References | Related Articles | Metrics

Plant ecology, resources and taxonomy

Select

Analysis of Soil Fertility and Heavy Metal Pollution of Urban Green Space in Huadu, Guangzhou LAI Wu-ting, MA Hong-yan, REN Xiong-ye, ZHU Zi-piao, LU Qiu-yan, YUAN Fu-jian, XIAN Na-huai 2022, 51(4): 264-271.  DOI: 10.3969/j.issn.1009-7791.2022.04.004 Abstract ( )   PDF (385KB) ( )   Based on the investigation of soil samples of urban green space in Huadu district of Guangzhou, the soil fertility and heavy metal pollution were analyzed and evaluated by using the nutrient grading standard of the second National Soil Census and Nemerow pollution index method. The results showed that the soil bulk density of green space in Huadu urban ranged from 1.25 g·cm–3 to 1.75 g·cm–3. The range of porosity was 30.81%–47.42%, and the pH was from 6.16 to 7.68. The contents of organic matter were below grade 4, and nitrogen and phosphorus were seriously deficient. In different types of green space, the heavy metal pollution of roadside green space soil was the most serious, followed by the green space on both sides of the main road; the pollution of As was the most serious in the study area, followed by Pb, not polluted by Zn, and Cu、Cd、Cr、Ni、Hg had different degrees of pollution. Correlation analysis showed that soil pH was significantly correlated with total potassium and alkali hydrolyzable nitrogen. Organic matter was significantly correlated with total nitrogen. Total nitrogen and total phosphorus were significantly positively correlated with alkali hydrolyzable nitrogen and available phosphorus, respectively. And total potassium was significantly negatively correlated with alkali hydrolyzable nitrogen. Among heavy metal elements, Cu was significantly correlated with Zn, Cr and Ni; Zn was significantly correlated with Cu, Pb, Cd, Cr and Ni; Pb was significantly correlated with Zn and Cd; and Cr was significantly correlated with Cu, Zn, Ni. As and Hg had no significant correlation with other heavy metals. References | Related Articles | Metrics

Select

Monitoring of Mikania micrantha Invasion Based on ‘Zhuhai-1’ Hyperspectral Remote Sensing Images YANG Lu, JIANG Xiao-hua, CHANG Wen-tao, LI Xian-yi 2022, 51(4): 272-281.  DOI: 10.3969/j.issn.1009-7791.2022.04.005 Abstract ( )   PDF (556KB) ( )   Based on the hyperspectral remote sensing image of ‘Zhuhai-1’ and the ground spectral data of Mikania micrantha, the decision tree hierarchical classification extraction method was used to realize the identification and extraction of large-scale invasion information of M. micrantha. The results showed that the OHS hyperspectral data could accurately reflect the spectral characteristics of M. micrantha. In the 32 bands of OHS hyperspectral data, Band13 (665 nm), Band22 (780 nm), Band25 (833 nm), Band26 (850 nm), Band27 (865 nm), Band28 (880 nm) were the best bands for the identification and information extraction of M. micrantha. Using OHS hyperspectral data to monitor the distribution of M. micrantha, the extraction accuracy reached 82.6%, which could meet the daily business needs of M. micrantha invasion monitoring and provide powerful help for the accurate control of M. micrantha. References | Related Articles | Metrics

Select

Carbon Storage and Carbon Density of Public Welfare Forest Tree Layers in Shaoguan, Guangdong HUANG Hua-rong 2022, 51(4): 282-287.  DOI: 10.3969/j.issn.1009-7791.2022.04.006 Abstract ( )   PDF (365KB) ( )   The carbon storage, carbon density and carbon sink of the dominant tree species and age group in the public welfare forest arbor layer were studied in Shaoguan city. The results showed that the carbon storage of Shaoguan public welfare forest arbor was 190.06 Tg, and the dominant tree species for total carbon sequestration were broad-leaved. The average carbon density was 34.73 t·hm–2, and the carbon density of tree species generally increased with the increase of age group; the carbon sink of public welfare forest arbor was 239 000 t·a–1, it was mainly carbon sink of young and middle-aged forests. Increasing the stock volume per unit area of broad-leaved forests and young and middle-aged tree species was the main way to increase the organic carbon storage and carbon sink function of public welfare forests. References | Related Articles | Metrics

Select

Military Material Medica Resources from Western Hunan, China (Ⅱ) Investigation and Analysis of Trauma Treatment Medicinal Plant LIAO Zhi-hui, LIAO Li-xiu, QIU Li-xiang, HE Xian-yu, CHENG Gong-xi 2022, 51(4): 288-298.  DOI: 10.3969/j.issn.1009-7791.2022.04.007 Abstract ( )   PDF (446KB) ( )   In order to further understand the situation of miltary materia medica resources in western Hunan, the wild medicinal plants for trauma treatment were investigated. Field investigation, specimen collection and identification, literature review and other methods were used to statistically analyze the medicinal plant resources of its military materia medica for trauma treatment. The results showed that there were 348 species of trauma treatment medicinal plants of military materia medica in this area, belonging to 228 genera in 110 families, with Compositae, Leguminosae, Labiatae, and Pteris, Rumex and Selaginella as the dominant families and genera. The living habits were dominated by herbs, and the habitat distribution was dominated by hillsides. The geographical composition was complex and diverse. The families were mainly distributed by Cosmopolitan, the genera were mainly distributed in the pan tropics, and the species were mainly distributed in endemic to China and East Asia type. There was a certain difference in the horizontal distribution between the north and the south, and the most medicinal plants for trauma treatment were distributed vertically within the range of 500–1000 m above sea level. The distribution of miltary materia medica medicinal plants for trauma treatment was the most. The main functions of the medicinal plants were divided into three categories, treatment of burns and scalds, hemostasis and treatment of traumatic injuries. The chemical components in the medicinal plants were mainly terpenoids, glycosides and steroids. For trauma treatment, the application methods of medicinal plants were mainly external application and oral administration, followed by decoction or wine. The medicinal parts were mainly whole grass and rhizome. There were abundant resources of military medicinal plants in western Hunan, so we should pay attention to the development, utilization and protection. References | Related Articles | Metrics

Select

Flora of Vascular Plants in the Source Region of Dongjiang River, Southeast Jiangxi, China LIN Jie-yu, ZENG Si-jin, LI Wen-bin, CHEN Lei-yi, TANG Guang-da 2022, 51(4): 299-305.  DOI: 10.3969/j.issn.1009-7791.2022.04.008 Abstract ( )   PDF (370KB) ( )   The wild surveys were continuously carried out for the forest plants in the source region of Dongjiang River, Jiangxi Province from 2009 to 2016. 2402 specimens were collected, and the list of vascular plants was provided with the field-collected specimens and literature. The results showed that there were 1286 species of vascular plants belonging to 640 genera in 190 families. Among them, 35 families and 65 genera and 134 species of ferns, 6 families and 8 genera and 9 species of gymnosperms, 149 families and 567 genera and 1143 species of angiosperms. The families with most abundant species were Compositae, Gramineae, Papilionaceae and Rosaceae. And the dominant families in the arboreal layer were Lauraceae, Fagaceae, Elaeocarpaceae, Euphorbiaceae and Theaceae, with the highest proportion of pantropical distribution (28.42% removed cosmopolitan type). The geographical composition of genera was dominated by the pantropical distribution and its variants, accounting for 29.26% (removed cosmopolitan type), followed by a higher composition of the tropical Asian distribution and its related types. The vascular flora composition was more consistent with the latitudinal zone in which the Dongjiang source region was located, but the tropical and pantropical flora components were relatively high, which might be related to the warm and humid airflow in the southeast and the migration of its southeastern coastal plants. References | Related Articles | Metrics

Select

Elevational Distribution Patterns of Orchids in Xiangtoushan National Nature Reserve, Guangdong Province KANG Ning, LIU Cai-qin, ZHANG Yue, LIU Xin, 2022, 51(4): 306-312.  DOI: 10.3969/j.issn.1009-7791.2022.04.009 Abstract ( )   PDF (545KB) ( )   A specific wild survey of orchids was conducted in Xiangtoushan National Nature Reserve, Guangdong province from 2019 to 2022. The species, population size, life forms, altitude and habitats were recorded about these orchids. The elevational distribution patterns were analyzed. Meanwhile, the endangered status of the recorded orchids was counted?according to The Provincial Red List of Higher Plants in Guangdong and the List of Key Protected Wild Plants in China. The results showed that: (1) 48 species of orchids belonging to 33 genera were recorded, most of which had small populations; (2) The orchid species diversity showed a hump-shaped pattern along the elevational gradient with a peak at mid-elevations, of which terrestrial, epiphytic, and saprophytic orchids showed the same trend; (3) The endangered species were mainly concentrated at 200–500 m; (4) The similarity coefficient of orchid species was higher at adjacent elevations, while the similarity coefficient was lower at greater elevation gradient. The species diversity of orchids decreased at low elevations probably due to the frequent human disturbance. And the mid-elevations owned the higher orchid species diversity partly because the habitat is suitable for the survival of orchids. A few orchids appeared in high elevations with the limited available resources for the growth and development of orchids. References | Related Articles | Metrics

Select

Investigation on Winter Ornamental Fruit and Flower Plants in Xiamen YING Meng-yun, SHI Jian-yu 2022, 51(4): 313-319.  DOI: 10.3969/j.issn.1009-7791.2022.04.010 Abstract ( )   PDF (597KB) ( )   Based on the investigation of ornamental fruit and flower plants in winter in Xiamen, analyzes the life type, ornamental characteristics, color and application frequency. The results showed that there were 25 ornamental fruit plants species (including subspecies and varieties) in winter in Xiamen, belonging to 22 genera in 20 families；there are 63 flower plants species (including subspecies and varieties), belonging to 51 genera in 33 families. The ornamental fruit plants were mainly evergreen trees and shrubs in winter in Xiamen, and the fruit color was mainly red. The advantage of ornamental fruit plants with high application frequency was not obvious. Arbor were dominant for flower plants, the flower color was mainly red and yellow. The advantage of flower plants with high application frequency was obvious. The flower plants with lining flower phase were dominant. The resources of ornamental fruit plants and flower plants were rich in Xiamen, but there were fewer ornamental fruit plants that showed good performance in winter. Some plants that do well were not universally used and plant landscape construction was not reasonable. For these problems, suggestions were put forward for the plant configuration in winter in Xiamen. References | Related Articles | Metrics

Select

New Records of Seed Plants from Guangdong Province Ⅲ LIN Min, DENG Li-ji, GUO Jian-qiang, LIAO Li-juan, LIAO Wen-bo, FAN Qiang 2022, 51(4): 320-324.  DOI: 10.3969/j.issn.1009-7791.2022.04.011 Abstract ( )   PDF (263KB) ( )   One genus, Parietaria L. and five species, Sedum tosaense Makino., Indigofera parkesii Craib, Parietaria micrantha Ledeb., Yinshania sinuata subsp. qianwuensis (Y. H. Zhang) Al-Shehbaz et al. and Biondia microcentra (Tsiang) P. T. Li, were reported as new records in Guangdong Province, China. All of them were discovered in Danxiashan National Nature Reserve. The discovery of these new records had enriched the germplasm resources of Guangdong Province and provided the basis for the study on the plant diversity and florogenesis of Mt. Danxia. References | Related Articles | Metrics

Select

Additions to the Bryoflora of Guangdong Province, China LIU Wei-qiu, ZHANG Li, 2022, 51(4): 325-330.  DOI: 10.3969/j.issn.1009-7791.2022.04.012 Abstract ( )   PDF (326KB) ( )   Based on the detailed field investigation and herbarium study of bryophytes specimens from Chebaling Nature Reserve in Guangdong Province, 6 new records of Guangdong bryoflora were reported. These species are Syrrhopodon parasiticus (Sw. ex Brid.) Besch., Fissidens bogoriensis M. Fleisch., Fissidens closteri?subsp.?kiusiuensis (Sakurai) Z. Iwats., Plagiomnium elimbatum?(M. Fleisch.) T. Kop., Haplocladium larminatii (Broth. et Par.) Broth. and Haplocladium strictulum (Card.) Reim. References | Related Articles | Metrics