Under artificially-simulated complex salt-alkali stress, the levels of active oxygen metabolism in roots were studied using three-year-old cutting seedlings of Spiraea × bumalda ‘Gold Mound＇ and Spiraea × ...Under artificially-simulated complex salt-alkali stress, the levels of active oxygen metabolism in roots were studied using three-year-old cutting seedlings of Spiraea × bumalda ‘Gold Mound＇ and Spiraea × bumalda ‘Gold Flame＇. The present study aimed at exploring the antioxidant capacity in roots of spiraeas and revealing their adaptability to salt-alkali stress. Results indicate that the oxygen free radicals contents, electrolyte leakage rates and MDA contents in roots of Spiraea × bumalda ＇Gold Mound＇ and Spiraea × bumalda ＇Gold Flame＇ show an increasing tendency with the increases of the salinity and pH value, whereas the activities of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT） all increased firstly and then decreased. With the increase in intensity of salt-alkali stress, the CAT activity in roots of Spiraea × bumalda ‘Gold Flame＇ is higher and the increasing extents in the oxygen free radicals contents, electrolyte leakage rates as well as MDA contents are lower compared with Spiraea × bumalda ‘Gold Mound＇, indicating that Spiraea × bumalda ‘Gold Flame＇ has a stronger antioxidant capacity.展开更多
Two new C20 hetisine-type diterpenoid alkaloids, spirafine III (1) and spirafine II (2), were isolated from the roots of Spiraea fritschiana var, parvifolia. Their structures were elucidated based on HRMS: IR and NMR ...Two new C20 hetisine-type diterpenoid alkaloids, spirafine III (1) and spirafine II (2), were isolated from the roots of Spiraea fritschiana var, parvifolia. Their structures were elucidated based on HRMS: IR and NMR spectral data, and chemical reaction.展开更多
Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 ...Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 was carried out on the basis of 1D and 2D NMR spectra.展开更多
The 26 taxa of genus Spiraea (Rosaceae) in 14 Korean taxa and four taxa of them doubled in the world itself were collected and investigated phylogenetic relationships within these taxa using the chloroplast trnL-trnF ...The 26 taxa of genus Spiraea (Rosaceae) in 14 Korean taxa and four taxa of them doubled in the world itself were collected and investigated phylogenetic relationships within these taxa using the chloroplast trnL-trnF region. Sequence variation within the genus Spiraea was mostly due to insertion/deletion. Total alignment sequence of trnL-trnF region in genus Spiraea was 1004 positions, of which 126 were parsimony-informative, 149 variable, 23 singleton, and 847 constant characters. The base furtherance did not show a significant difference among total taxa. Although many taxa of genus Spiraea were well separated each other, many branches were not congruent with the taxon positions with botanical names. In addition, sequences of the chloroplast trnL-trnF region for same species are different from each other according to authors. The taxonomic identification of genus Spiraea are in need of revision.展开更多
Chemical investigation on the ethanol extract from the roots of Spiraea japonica var. acuta resulted in the isolation of two new diterpene alkaloids named spiratines A and B (1-2), respectively.
A new species, Spiraea cudidaghense(sect. Spiraeoideae, Rosaceae), is described and illustrated with diagnostic characters and taxonomic comments. Its characteristics are compared with those of the type species from w...A new species, Spiraea cudidaghense(sect. Spiraeoideae, Rosaceae), is described and illustrated with diagnostic characters and taxonomic comments. Its characteristics are compared with those of the type species from which it differs mainly in compound corymbs inflorescence, ovate-obovate leaves, white petals, glabrous branches and densely pilose corymbs. In addition, a map of the geographic distribution of the new species, an IUCN ranking and notes on taxonomic affinities are also provided.展开更多
The results of a study conducted by light microscopy methods of the anatomical structure of the vegetative organs of Spiraea hypericifolia growing in natural habitat in the Bakhmal district in the south of the Jizzakh...The results of a study conducted by light microscopy methods of the anatomical structure of the vegetative organs of Spiraea hypericifolia growing in natural habitat in the Bakhmal district in the south of the Jizzakh region of Uzbekistan are presented and the following diagnostic features are identified: in the leaf—isolateral-palisade type of mesophyll leaf;thick-walled outer walls of the epidermis;amphystomatic leaves;not submerged stomata;chlorophyll-bearing palisade and spongy parenchyma;open collateral type of vascular bundles and sclerified, due to collenchymal cells;in the stem and root—the beam type of structure and more lignified;the stem and root are divided into three topographic zones: the periderm (cork), the secondary cortex and the central cylinder;the periderm is represented by a cork and its cells are dark brown, thick-walled, tightly closed;groups of bast fibers are formed under the cow parenchyma;extensive librimiform;core and radial rays elongated and short;the phloem is extensive, located between the cortex parenchyma and libriform;the narrow core is represented by large and small, round-oval, thin-walled parenchymal cells and they contain hydrocytic cells. Diagnostic signs revealed by us reflect more xeromorphic of this species. All traits were compared, and we concluded that the anatomical traits of the leaf, stem, and root may be useful in providing diagnostic traits for distinguishing the taxa studied.展开更多
Abstract: Two new hetisine-type C20-diterpenoid alkaloids named spiraqine (1) and 6-hydroxylspiraqine (2), and four known alkaloids, namely spiredine (3), spiradine A (4), spiradine B (5), and spirasine V/VI (6), were...Abstract: Two new hetisine-type C20-diterpenoid alkaloids named spiraqine (1) and 6-hydroxylspiraqine (2), and four known alkaloids, namely spiredine (3), spiradine A (4), spiradine B (5), and spirasine V/VI (6), were isolated from Spiraea japonica L. f. var. fortunei(Planchon) Rehd. The structures of the alkaloids were elucidated using nuclear magnetic resonance analysis (1H-NMR, 13C-NMR, DEPT, HMQC, and HMBC) and mass spectrometry data.展开更多
基金supported by Innovation Team Project of Northeast Agricultural University of P. R. China (CXZ004-3)Science Foundation of Heilongjiang Province (C2007-16)
文摘Under artificially-simulated complex salt-alkali stress, the levels of active oxygen metabolism in roots were studied using three-year-old cutting seedlings of Spiraea × bumalda ‘Gold Mound＇ and Spiraea × bumalda ‘Gold Flame＇. The present study aimed at exploring the antioxidant capacity in roots of spiraeas and revealing their adaptability to salt-alkali stress. Results indicate that the oxygen free radicals contents, electrolyte leakage rates and MDA contents in roots of Spiraea × bumalda ＇Gold Mound＇ and Spiraea × bumalda ＇Gold Flame＇ show an increasing tendency with the increases of the salinity and pH value, whereas the activities of superoxide dismutase （SOD）, peroxidase （POD） and catalase （CAT） all increased firstly and then decreased. With the increase in intensity of salt-alkali stress, the CAT activity in roots of Spiraea × bumalda ‘Gold Flame＇ is higher and the increasing extents in the oxygen free radicals contents, electrolyte leakage rates as well as MDA contents are lower compared with Spiraea × bumalda ‘Gold Mound＇, indicating that Spiraea × bumalda ‘Gold Flame＇ has a stronger antioxidant capacity.
文摘Two new C20 hetisine-type diterpenoid alkaloids, spirafine III (1) and spirafine II (2), were isolated from the roots of Spiraea fritschiana var, parvifolia. Their structures were elucidated based on HRMS: IR and NMR spectral data, and chemical reaction.
基金This research was financially supported by the National NatUral Science Foundation of China
文摘Chemical investigation on the neutral fraction of the ethanol extract from the roots of Spiraea japonica var. acuta has resulted in the isolation of one new diterpene amide, spiramide (1). Structure elucidation for 1 was carried out on the basis of 1D and 2D NMR spectra.
文摘The 26 taxa of genus Spiraea (Rosaceae) in 14 Korean taxa and four taxa of them doubled in the world itself were collected and investigated phylogenetic relationships within these taxa using the chloroplast trnL-trnF region. Sequence variation within the genus Spiraea was mostly due to insertion/deletion. Total alignment sequence of trnL-trnF region in genus Spiraea was 1004 positions, of which 126 were parsimony-informative, 149 variable, 23 singleton, and 847 constant characters. The base furtherance did not show a significant difference among total taxa. Although many taxa of genus Spiraea were well separated each other, many branches were not congruent with the taxon positions with botanical names. In addition, sequences of the chloroplast trnL-trnF region for same species are different from each other according to authors. The taxonomic identification of genus Spiraea are in need of revision.
基金financially supported by the National Foundation for Outstanding Young Scientists to X.J.Hao(No.39525025).
文摘Chemical investigation on the ethanol extract from the roots of Spiraea japonica var. acuta resulted in the isolation of two new diterpene alkaloids named spiratines A and B (1-2), respectively.
文摘A new species, Spiraea cudidaghense(sect. Spiraeoideae, Rosaceae), is described and illustrated with diagnostic characters and taxonomic comments. Its characteristics are compared with those of the type species from which it differs mainly in compound corymbs inflorescence, ovate-obovate leaves, white petals, glabrous branches and densely pilose corymbs. In addition, a map of the geographic distribution of the new species, an IUCN ranking and notes on taxonomic affinities are also provided.
文摘The results of a study conducted by light microscopy methods of the anatomical structure of the vegetative organs of Spiraea hypericifolia growing in natural habitat in the Bakhmal district in the south of the Jizzakh region of Uzbekistan are presented and the following diagnostic features are identified: in the leaf—isolateral-palisade type of mesophyll leaf;thick-walled outer walls of the epidermis;amphystomatic leaves;not submerged stomata;chlorophyll-bearing palisade and spongy parenchyma;open collateral type of vascular bundles and sclerified, due to collenchymal cells;in the stem and root—the beam type of structure and more lignified;the stem and root are divided into three topographic zones: the periderm (cork), the secondary cortex and the central cylinder;the periderm is represented by a cork and its cells are dark brown, thick-walled, tightly closed;groups of bast fibers are formed under the cow parenchyma;extensive librimiform;core and radial rays elongated and short;the phloem is extensive, located between the cortex parenchyma and libriform;the narrow core is represented by large and small, round-oval, thin-walled parenchymal cells and they contain hydrocytic cells. Diagnostic signs revealed by us reflect more xeromorphic of this species. All traits were compared, and we concluded that the anatomical traits of the leaf, stem, and root may be useful in providing diagnostic traits for distinguishing the taxa studied.
文摘Abstract: Two new hetisine-type C20-diterpenoid alkaloids named spiraqine (1) and 6-hydroxylspiraqine (2), and four known alkaloids, namely spiredine (3), spiradine A (4), spiradine B (5), and spirasine V/VI (6), were isolated from Spiraea japonica L. f. var. fortunei(Planchon) Rehd. The structures of the alkaloids were elucidated using nuclear magnetic resonance analysis (1H-NMR, 13C-NMR, DEPT, HMQC, and HMBC) and mass spectrometry data.
