FLORAL PIGMENTS AND PHYLOGENY IN ECHINOCEREUS (CACTACEAE)
FLORAL PIGMENTS AND PHYLOGENY IN ECHINOCEREUS (CACTACEAE)
复制标题
DOI：
10.1097/00007632-198802000-00008
复制
发表时间：
1988-04-01
影响因子：
1
通讯作者：
MILLER, JM
中科院分区：
文献类型：
--
作者：
MILLER, JM
根据花黄酮苷类化合物的特征，提出了一个系统发育假说。chloranthus，E. engelmannii、艾氏棘球绦虫E. enneacanthus，九棘杜父鱼D. fendleri、艾美耳球虫E. pectinatus、栉孔扇贝E. polyacanthus、多棘球绦虫E. reichenbachii、黑腹叶蝉E. rigidissimus、E. scopulorum、盾叶草E. stoloniferus、E. stramineus、E. subinermis、E. triglochidiatus和E.绿花。提出了一个涉及黄烷酮-，二氢黄酮醇-，黄酮-和黄酮醇-7-O-糖苷的生物合成方案，以澄清字符极性的关键假设。统一模型提出，紫外线太阳辐射的增强伴随着气候变化和雨洪后自然栖息地的日益干旱。据推测，气候变化的驱动力背后的修改花黄酮类化合物作为可能的紫外线屏幕在仙人掌花。共享衍生的小分子化学综合征（存在黄烷酮-和二氢黄酮醇-7-O-糖苷）的分类群被认为比具有普通黄酮醇的3-O-单-和二糖苷的那些物种更先进，因为这些黄酮类化合物可能更好地保护仙人掌花免受UV-B中潜在的破坏性辐射。黄酮-和黄酮醇-7-O-糖苷也被认为是无定形的，因为它们是UV-B类黄酮屏蔽剂的直接生物合成衍生物。根据已知祖先状态的Camin-Sokal简约性模型，建立了14个种的系统发育假说。chloranthus，E. engelmannii、艾氏棘球绦虫E. enneacanthus，九棘杜父鱼D. fendleri、艾美耳球虫E. pectinatus、栉孔扇贝E. polyacanthus、多棘球绦虫E. reichenbachii、黑腹叶蝉E. rigidissimus、E. scopulorum、盾叶草E. stoloniferus、E. stramineus、E. subinermis、E. triglochidiatus和E.绿花。提出了一个涉及黄烷酮-，二氢黄酮醇-，黄酮-和黄酮醇-7-O-糖苷的生物合成方案，以澄清字符极性的关键假设。统一模型提出，紫外线太阳辐射的增强伴随着气候变化和雨洪后自然栖息地的日益干旱。据推测，气候变化的驱动力背后的修改花黄酮类化合物作为可能的紫外线屏幕在仙人掌花。共享衍生的小分子化学综合征（存在黄烷酮-和二氢黄酮醇-7-O-糖苷）的分类群被认为比具有普通黄酮醇的3-O-单-和二糖苷的那些物种更先进，因为这些黄酮类化合物可能更好地保护仙人掌花免受UV-B中潜在的破坏性辐射。黄酮-和黄酮醇-7-O-糖苷也被认为是无定形的，因为它们是UV-B类黄酮屏蔽剂的直接生物合成衍生物。Camin-Sokal吝啬与已知的祖先状态（从统一模型确定）允许建设假设的14个物种的遗传。
A phylogenetic hypothesis is presented based upon floral flavonoid glycoside characters from 87 geographically separated populations representing 14 species of Echinocereus including E. chloranthus, E. engelmannii, E. enneacanthus, D. fendleri, E. pectinatus, E. polyacanthus, E. reichenbachii, E. rigidissimus, E. scopulorum, E. stoloniferus, E. stramineus, E. subinermis, E. triglochidiatus, and E. viridiflorus. A biosynthetic scheme involving flavanone-, dihydroflavonol-, flavone-, and flavonol-7-O-glycosides is put forth to clarify critical assumptions of character polarity. The unifying model proposes that intensification of ultraviolet solar radiation accompanied climatic change and increasing aridity of post-pluvial natural habitats. It is assumed that climatic change was the driving force behind the modification of floral flavonoids which act in cactus flowers as possible ultraviolet screens. Taxa which share the derived micromolecular chemosyndrome (presence of flavanone- and dihydroflavonol-7-O-glycosides) are considered more advanced than those species with 3-O-mono- and diglycosides of the common flavonols, because these flavonoids presumably better shield the cactus flowers from potentially damaging radiation in the UV-B. Flavone- and flavonol-7-O-glycosides are also considered to be apomorphic since they are immediate biosynthetic derivations of the UV-B flavonoid screening agents. Camin-Sokal Parsimony with known ancestral states (determined from the unifying model) allowed the construction of hypothetical phylogenies for 14 species.A phylogenetic hypothesis is presented based upon floral flavonoid glycoside characters from 87 geographically separated populations representing 14 species of Echinocereus including E. chloranthus, E. engelmannii, E. enneacanthus, D. fendleri, E. pectinatus, E. polyacanthus, E. reichenbachii, E. rigidissimus, E. scopulorum, E. stoloniferus, E. stramineus, E. subinermis, E. triglochidiatus, and E. viridiflorus. A biosynthetic scheme involving flavanone-, dihydroflavonol-, flavone-, and flavonol-7-O-glycosides is put forth to clarify critical assumptions of character polarity. The unifying model proposes that intensification of ultraviolet solar radiation accompanied climatic change and increasing aridity of post-pluvial natural habitats. It is assumed that climatic change was the driving force behind the modification of floral flavonoids which act in cactus flowers as possible ultraviolet screens. Taxa which share the derived micromolecular chemosyndrome (presence of flavanone- and dihydroflavonol-7-O-glycosides) are considered more advanced than those species with 3-O-mono- and diglycosides of the common flavonols, because these flavonoids presumably better shield the cactus flowers from potentially damaging radiation in the UV-B. Flavone- and flavonol-7-O-glycosides are also considered to be apomorphic since they are immediate biosynthetic derivations of the UV-B flavonoid screening agents. Camin-Sokal Parsimony with known ancestral states (determined from the unifying model) allowed the construction of hypothetical phylogenies for 14 species.