FUNCTIONAL‐MORPHOLOGICAL RELATIONSHIPS IN SARGASSUM POLYCERATIUM (PHAEOPHYTA): PHENOTYPIC AND ONTOGENETIC VARIABILITY IN APPARENT PHOTOSYNTHESIS AND DARK RESPIRATION 1
FUNCTIONAL‐MORPHOLOGICAL RELATIONSHIPS IN SARGASSUM POLYCERATIUM (PHAEOPHYTA): PHENOTYPIC AND ONTOGENETIC VARIABILITY IN APPARENT PHOTOSYNTHESIS AND DARK RESPIRATION 1
复制标题
马尾藻（褐藻门）的功能形态关系：表观光合作用和暗呼吸的表型和个体遗传变异性 1
DOI：
10.1111/j.0022-3646.1989.00713.x
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发表时间：
1989
影响因子：
2.9
通讯作者：
D. S. Littler
中科院分区：
文献类型：
--
作者：
J. A. Kilar;M. Littler;D. S. Littler
多角马尾藻表观光合作用和暗呼吸的表型和个体发生变化。相关的差异分配的资源叶片，茎，囊泡，和肥沃的分支以及解剖参数的表面积，体积和叶片密度从人口的内容键，佛罗里达。三个不同的表型进行了评估，在四个阶段的个体发育：最大增长（10月），繁殖高峰期（12月），衰老（4月），停滞（7月）。光合速率和呼吸速率全年变化，在不同阶段的形态建成，并在不同的表型。光合作用在活跃生长期最高，在繁殖和衰老期下降，在停滞期最低。与此相反，呼吸是在高峰期繁殖和停滞。时间，表型，和个体发育的变化，在表观光合作用的最好的解释之间的相互作用的解剖特征，生长阶段，源-库关系的代谢储备和色素。表面积：体积（SA：V）比起次要作用。成熟轴的光合性能下降的资源分配远离叶片到气囊和肥沃的分支。表观生产力与表型上可育枝的发育不相关。高呼吸速率，SA：V比，叶片面积，和低叶片密度发生在发展中的轴和适应低光场是一致的。多角马尾藻由于其形态分化，是一种相对复杂、生理多变的藻类。
Phenotypic and ontogenetic changes in apparent photosynthesis and dark respiration for Sargassum polyceratium Mont. were related to the differential allocation of resources into blades, stems, vesicles, and fertile branches as well as anatomical parameters of surface area, volume, and blade density from a population in the Content Keys, Florida. Three divergent phenotypes were evaluated during four phases of ontogeny: maximum growth (October), peak reproduction (December), senescence (April), and stasis (July). Photosynthetic and respiratory rates changed throughout the year, at different stages of morphogenesis, and among different phenotypes. Photosynthesis was highest during active growth, decreased during reproduction and senescence, and was lowest during stasis. In contrast, respiration was higher during peak reproduction and stasis. Temporal, phenotypic, and ontogenetic changes in apparent photosynthesis were best explained by interactions among anatomical features, growth stages, and source‐sink relationships of metabolic reserves and pigments. Surface area: volume (SA:V) ratios played a secondary role. Photosynthetic performance of mature axes decreased with the allocation of resources away from blades to air bladders and fertile branches. Apparent productivity and development of fertile branches on phenotypes were not correlated. High respiratory rates, SA:V ratios, blade areas, and low blade densities occurred on developing axes and were consistent with adaptations to low light fields. Sargassum polyceratium, because of its morphological differentiation, is a relatively complex, physiologically variable alga.