英语词汇“callose”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

　

单词	callose
释义	callose cal·lose C0040900 (kăl′ōs′)n. Botany A complex branched carbohydrate commonly associated with sieve areas of sieve elements. [From Latin callōsus, callous; see callous.] callose (ˈkæləʊz) n (Botany) a carbohydrate, a polymer of glucose, found in plants, esp in the sieve tubes cal•lose (ˈkæl oʊs) adj. 1. having thickened or hardened spots, as a leaf. n. 2. callus (def. 2). [1860–65; < Latin callōsus] Callose callose [′ka‚lōs] (biochemistry) A carbohydrate component of plant cell walls; associated with sieve plates where calluses are formed. (biology) Having hardened protuberances, as on the skin or on leaves and stems. Callose a polysaccharide, insoluble in water, contained in plants and consisting of glucose-molecule residues joined in a spiral chain (as opposed to cellulose, in which the glucose molecules are joined in a straight chain). Callose lines the tubules of the sievelike layers of phloem; asthese tubules age, the amount of callose increases and the tubulesbecome plugged and cease functioning. When a plant is injured, callose is deposited on the cell walls of the parenchyma, forminga callus. Callose is also found in the cell walls of some algae andfungi. callose cal·lose (kal'ōs), A linear 1,3-β-d-glucan formed by certain enzymes from UDP-glucose, differing from cellulose (a β-1,4-glucan formed from GDP-glucose) and starch amylose (an α-1,4-glucan formed from ADP-glucose). Found in certain plant cell walls. callose a thick CARBOHYDRATE plant material deposited in the pores of sieve plates in response to damage, disease or simply over a period of time, resulting in a blockage of the SIEVE TUBE. Callose is also present in the walls of fungal hyphae.
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更新时间：2025/1/31 13:52:18