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《植物学报(英文版)》 1979-02
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REGULATION AND CONTROL OF MULTIPLE PATHWAYS OF RESPIRATORY METABOLISM IN RELATION TO OTHER PHYSIOLOGICAL FUNCTIONS IN HIGHER PLANTS

Tang Pei-song Institute of Botany, Academia Sinica, Peking  
This account presents the views of the author on the functional and regulatory aspects of respiratory metabolism in higher plants: Control of metabolism (by enzy- mes) and the interaction of respiration with the other physiological functions in the living plant (metabolic control). This concept, formulated in the early fifties (ref. 47), was presented in part in 1965 (ref. 2) based on experiments performed mostly by the author and his colleagues and by his co-workers in this country. After an interruption of a decade, during which his work was discontinued, a more complete formulation of his views are given here based on results reported by workers in this field in other countries during that period. The more complete view can now be summarized as follows: Respiratory metabolism is the process whereby a part of the material stored in the plant (organism) is converted into biological work (function) for maintaining its state of being alive, while the other part of the same material is converted into subs- tances of higher degrees of orderliness (negative entropy) in the form of structure and organization. Within limits imposed by the genetic potential, these processes are controlled by enzymes which in turn are regulated by internal and external factors. The above statement is essentially a special expression of a general view on the functional aspects of living organisms given in the author's earlier book, Green Thral- dom (Allen Unwin, London, 1949). If the above theme finds acceptance, it follows, as stated earlier (ref. 14), that: 1. Respiratory metabolic pathways must be multiple ("multilineal") and multi- directional; 2. They must be interacting, not only with themselves, but also with other functions in the plant, alternatingly in time and separately in space (eompart- mentation); 3. There must be mutual interactions among the pathways and func- tions regulated by enzymes which in turn are regulated through external and internal factors. This functional and regulatory concept of respiratory metabolism in higher plant are now summarized by the following expressions: 1. CH_2O+O_2 →X_1→X_2 →H_2O+CO_2+E in whieh E=Energy, X_1, X_2 etc. represent intermediate products, and Y_1, Y_2 etc. represent anabolic products of different compositivn and different degrees of comple- xity. 2. Borrowing from the second law of thermodynamics, the free energy △G deri- ved from process 1 is used for performance of physiological work (function) during which part of the energy is given off in the form of heat (△H), and the other part is concerned with the change of materials of lower orderliness into form and structure with a decrease in entropy (△S): △G=△H-T△S in which T is temperature (in K). This equation may or may not be directly appli- cable without qualifications in our ease. But the decrease in entropy with the change of degree of orderliness in the process of tissue and organ formation from formless materials holds true. 3. The third expression presents the fundamental aspects of our concept of control of metabolism by enzymes and metabolic control of physiological functions. This may be given as: Gene→Enzymes→Metabolism→Fuction Sturcture State Time cource (Solid arrows denote Control) Experimental evidences selected from the numerous published experimental re- sults, mostly from those of our own, in support of the above scheme at the substrate level oxidation in addition to those given in an earlier account (ref. 2) are presented here. Evidences based on experiments during the past decade on multiple pathways in NADH oxidation through the electron transport chain gathered in the literature (ref. 37) during the period when our work was interrupted completes the formula- tion of our concept on respiratory metabolism at both the substrate and terminal oxida- tion levels. The use of this generalized concept on the functional and regulatory aspects of respiratory metabolism in higher plants for guiding further research on plant respira- tion and on other physiological processes, as well as the application of this concept to practical physiological and biological problems are discussed.
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【Co-references】
Chinese Journal Full-text Database 10 Hits
1 ZHANG Su-qin et al(College of Agronomy,Guizhou University,Guiyang,Guizhou 550025);Effects of the Low-temperature Stress on the Photosynthetic Characteristics of Eggplant Varieties with Different Cold Resistance[J];Journal of Anhui Agricultural Sciences;2007-27
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3 WAN Ping 1,LIU Da jun 2 (1 Biotechnological Centre,Anhui Agricultural University,Hefei 230036; 2 Department of Agronomy,Nanjing Agricultural University);Study on Preharvest Sprouting Resistance of Tom Thurmb in Wheat[J];JOURNAL OF ANHUI AGRICULTURAL UNIVERSITY;2001-01
4 PEI Xiao-bo~(1, 2, 3),LI Shi-cheng~2,CAI Run~3(1.School of Horticulture, Anhui Agricultural University, Hefei 230036;2.Shanghai Academy of Agricultural Sciences,Shanghai Key Laboratory of Protected horticultural Technology,Shanghai 201106;3.School of Agronomy and Biology, Shanghai Jiaotong University,Shanghai 201101);Effects of Sustained Low Intensity Light Treatment on GrowthDevelopment and Photosynthetic Rate of Cucumber[J];Journal of Anhui Agricultural University;2005-03
5 WANG Ping,GUO Xiao-dong,ZHAO Peng(Institute of vegetable,Gansu Acadamy of Agricultural Science,Lanzhong 730070);Effeceion of Low Temperate and Weak Light on Hot Pepper[J];Northern Horticulture;2007-07
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7 Wang Xue min,Yi Jin (Inner Mongolia Agricultural University, Huhhot, Inner Mongolia Autonomous Region 010018, China);The Study on Germinating Conditions and Physiological Characteristics of Ceratoides Seeds[J];Acta Agrestia Sinica;2003-02
8 YI Jin 1,WANG Xue min 1,GU An lin 2,XU Jun 1 (1.Inner Mongolia Agricultural University, Huhhot 010019,China; 2.Grassland Research Institute; Chinese Academy of Agricultural Sciences, Huhhot, Inner Mongolia Autonomous Region 010010,China);Study on the Moisture Physiology and Drought Resistance of Ceratoides Seeds[J];Acta Agrestia Sinica;2003-02
9 YI Jin 1,WANG Xue min 1,GU An lin 2,XU Jun 1 (1. Inner Mongolia Agricultural University, Huhhot 010019 China; 2. Grassland Research Institute; Chinese Academy of Agricultural Sciences, Huhhot, Inner Mongolia Autonomous Region 010010, China);Assessment of Salt Resistance and Physiology Basis of Seed and Seedling of Ceratoides[J];Acta Agrestia Sinica;2003-02
10 WANG Liu ying 1, HE Jun ying 1, YI Jin 1, ALATA 1, YU Bing 2 (1 Inner Mongolia Agricultural University, Huhhot, Inner Mongolia Autonomus Region 100018,China; 2 Inner Mongolia Academy of Animal, Huhhot, Inner Mongolia Autonomus Region 010030, China);Study on Embryonal Development of Ceratoides arborescens[J];Acta Agrestia Sinica;2003-02
【Secondary References】
Chinese Journal Full-text Database 1 Hits
1 TANG Wen-zhong,LI Xin-shu,HUANG Hai-yan,CAI Chun-er,HUO Yuan-zi,HE Pei-min (College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China);Effects of different light intensity and temperature treatment on photosynthesis and chlorophyll fluorescence in Ulva linza[J];Journal of Fisheries of China;2009-05
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