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Lack of Evidence for 3/4 Scaling of Metabolism in terrestrial plants

Journal of Integrative Plant Biology 2005年第10期47卷 1173-1183页

作者： Hai-Tao LI Xing-Guo HAN Jian-Guo WU Institute of Geographic Sciences and Natural Resources Research the Chinese Academy of Sciences Beijing 100101 China Laboratory of Quantitative Vegetation Ecology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Faculty of Ecology Evolution and Environmental Science School of Life Sciences Arizona State University Tempe AZ 85287-4501 USA

Scaling, as the translation of information across spatial, temporal, and organizational scales, is essential to predictions and understanding in all sciences and has become a central issue in ecology. A large body of theoretical and empirical evidence concerning allometric scaling in terrestrial individual plants and plant communities has been constructed around the fractal volume-filling theory of West, Brown, and Enquist （the WBE model）. One of the most thought-provoking findings has been that the metabolic rates of plants, like those of animals, scale with their size as a 3/4 power law. The earliest, single most-important study cited in support of the application of the WBE model to terrestrial plants claims that whole-plant resource use in terrestrial plants scales as the 3/4 power of total mass, as predicted by the WBE model. However, in the present study we show that empirical data actually do not support such a claim. More recent studies cited as evidence for 3/4 scaling also suffer from several statistical and data-related problems. Using a forest biomass dataset including 1 266 plots of 17 main forest types across China, we explored the scaling exponents between tree productivity and tree mass and found no universal value across forest stands. We conclude that there is not sufficient evidence to support the existence of a single constant scaling exponent for the metabolism-biomass relationship for terrestrial plants.

关键词： metabolism 3/4 power scaling terrestrial plants water use.

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The Ability of Some Aquatic and terrestrial plants to Purify Domestic Wastewater

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Phyton-International Journal of Experimental Botany 2023年第8期92卷 2245-2260页

作者： Abida Kausar Noreen Zahra Humaira Kiran Sadia Asim Abid Raza Ali Raza Department of Botany Government College Women UniversityFaisalabad38000Pakistan Department of Botany University of AgricultureFaisalabad38040Pakistan Department of Chemistry Government College Women UniversityFaisalabad38000Pakistan Department of Agronomy Muhammad Nawaz Shareef University of AgricultureMultan66000Pakistan College of Agriculture Fujian Agriculture and Forestry UniversityFuzhou350002China

The study aimed to evaluate the ability of some terrestrial and aquatic plants for wastewater puriﬁ*** plants can remove pollutants from wastewater by consuming and accumulating various contaminants in different parts of *** aquatic and terrestrial plants(Rosa sinensis,Typha latifolia,Ocimm bacilicum,Azolla pinnata,and Salvinia molesta)which have the ability to decrease water pollution were utilized in this *** capability offive different species of plants was investigated by measuring chemical oxygen demand(COD),biological oxygen demand(BOD),electrical conductivity(EC),total dissolved solids(TDS),and pH of the *** this research,some aquatic and terrestrial plants were transplanted in wastewater plastic pots containing domestic wastewater with different ratios of 50%and 100%.Then,after 30 days,the physiological and biochemical parameters of plants were calculated to observe the effect of wastewater on *** revealed higher chlorophyll and carotenoids in typha plants treated with 100%*** highest percentage of elimination in BOD(65%),COD(27%),TDS(72%),EC(83%),and pH(6.8%)was noted with the use of typha and ***,total soluble sugars,total free amino acids,and total proteins were found maximum in the hibiscus plant as compared to the other plants under 100%and 50%domestic wastewater treatment,while typha and ocimum showed lower values of these parameters irrespective of wastewater ***,the COD,BOD,TDS,EC,and pH trend was higher in 100%wastewater as compared to 50%*** into account the accumulation capacity of the tested plants especially typha can be efﬁciently used for the treatment of domestic wastewater.

关键词： Biological oxygen demand chemical oxygen demand domestic wastewater aquatic plants terrestrial plants

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Convergent relationships between flower economics and hydraulic traits across aquatic and terrestrial herbaceous plants

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Plant Diversity 2023年第5期45卷 601-610页

作者： Yan Ke Feng-Ping Zhang Yun-Bing Zhang Wei Li Qin Wang Da Yang Jiao-Lin Zhang Kun-Fang Cao CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan 666303China University of Chinese Academy of Sciences Beijing 100049China College of Traditional Chinese Medicine Yunnan University of Chinese MedicineKunmingYunnan 650500China School of Biological and Chemical Sciences Puer UniversityPuerYunnan 665000China State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources Guangxi Key Laboratory of Forest Ecology and ConservationGuangxi UniversityDaxuedong Road 100NanningGuangxi 530004China

Maintaining open flowers is critical for successful pollination and depends on long-term water and carbon *** the relationship between how flower hydraulic traits are coordinated in different habitats is poorly ***,we hypothesize that the coordination and trade-offs between floral hydraulics and economics traits are independent of environmental *** test this hypothesis,we investigated a total of 27 flower economics and hydraulic traits in six aquatic and six terrestrial herbaceous species grown in a tropical botanical *** found that although there were a few significant differences,most flower hydraulics and economics traits did not differ significantly between aquatic and terrestrial herbaceous *** flower mass per area and floral longevity were significantly positively correlated with the time required for drying full-hydrated flowers to 70%relative water *** dry matter content was strongly and positively related to drought tolerance of the flowers as indicated by flower water potential at the turgor loss *** addition,there was a trade-off between hydraulic efficiency and the construction cost of a flower across *** results show that flowers of aquatic and terrestrial plants follow the same economics spectrum *** results suggest a convergent flower economics design across terrestrial and aquatic plants,providing new insights into the mechanisms by which floral organs adapt to aquatic and terrestrial habitats.

关键词： Aquatic plants Floral longevity Flower economics traits Flower hydraulic traits terrestrial plants

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