米勒时刻jj
有变化请注意语法The plant senile is refers to the cell, the organ or the entire adult plant physiology function declines, finally natural death process.Is in the plant growth growth an important link, is one of life sciences domain research core questions.Senile is an altitude order regulative process, in which involves to the multitudinous physiological biochemistry responded, these responses both may cause the plant the senility, and may examine the plant through these responses the physiological condition.植物衰老时会出现蛋白质下降、核酸含量变化、光合速率下降、呼吸速率下降等生理生化变化。植物的衰老与自生基因和外界环境中光、温度、水分、营养等因素的影响有关。其调控机制公认的主要有自由基理论和细胞的程序死亡理论。 叶片衰老的分子机制可分为起始、衰退和终末三个阶段来研究。起始时期细胞的代谢发生变化，光合作用活性开始下降，衰老的信号传递链开始运行；衰退时期，细胞组分、大分子物质被降解；终末时期则是以细胞死亡诱导因子的积累、细胞完整性的破坏为特征，叶片脱落死亡。 关于植物衰老的研究，不仅具有理论上的重大意义，有助于认识植物的发育过程, 而且可能建立操纵植物衰老的方法，在农业生产以及园林花卉、城市绿化、分子育种等众多实用方面具有潜在的价值。
我就叫小猪
Plant is aging cells, organs or whole plant physiological functions recession, the process ultimately died of natural causes. Plant growth and development is an important part of that research in the field of life sciences is one of the core issues. Aging is a high degree of control and orderly process, which involves numerous physiological and biochemical reactions, these reactions can lead to plant aging, these reactions can be detected through the plant's physiological state. Aging plants will decline in protein, nucleic acid content, photosynthetic rates decline, respiratory rate and other physiological and biochemical changes decline. Since the plant's aging and health of the environment in and outside light, temperature, moisture, nutrients and other factors related to the impact. Its control mechanisms have recognized the major free radical theory and the theory of cell death process. Leaves the molecular mechanism of aging can be divided into start, recession and end three stages to study. The initial period of metabolic changes in photosynthesis activity started to decline, the aging of the signal transmission chain running; recession period, the cell components, macromolecular material was degraded end of the period of cell death induced by the accumulation of factors, Undermine the integrity of the cell is characterized by shedding dead leaves. On the study of plant aging, not only of theoretical significance, contribute to the understanding of plant development process and a possible manipulation of plant aging methods in agricultural production and flower gardens, urban greening, molecular breeding, and other practical aspects of the potential Value.
cupid8698小博士
Plant decrepitude is cell, organ or the whole plant physiology function decline, end nature death of process.BE a plant growth growth in importance of one wreath be a life science realm research of one of the core problems.The decrepitude is a height have an adjust of preface to control process, concern numerous physiology bio-chemical reaction among them, these reaction since can cause plant of decrepitude, again can pass these reaction examination plant of physiology appearance.Plant decrepitude will appear protein to descend, nucleic acid content variety, light match velocity to descend, breath the velocity descend etc. physiology bio-chemical variety.The decrepitude of plant with from living gene and the external world environment in light, temperature, humidity, nourishment etc. the influence of factor relevant.It adjust to control a mechanism generally accepted main have free radicals theories and the procedure of the cell death theories. Leaf's slice's member mechanism of the decrepitude can is divided into a start, decline with eventually end three stage to research.Start period cell of metabolism occurrence variety, the photo-synthesis activity start descend, decrepitude of the signal deliver a chain beginning circulate;The decline is period, cell set cent, the big member material be decline solution;Eventually end period then with cell death induce factor of break of backlog, the cell integrity for characteristic, leaf's slice shed off to die. As for plant decrepitude of research, not only have theoretically of great significance, contribute to understanding plant of growth process, and possibility the establishment manipulate a plant decrepitude of method, at agriculture produce and the park flower, city be green to turn, the member teach kind etc. numerous practical aspect have latent of value.
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