陳會(huì)鮮 羅興錄 曹升 郭雅靜 王戰(zhàn) 羅璇 單忠英
摘 要 采用高淀粉木薯品種輻選01和低淀粉木薯品種華南124作為試驗(yàn)材料,研究木薯塊根的腺苷二磷酸葡萄糖焦磷酸化酶(AGPase)及其同工酶活性與淀粉積累的關(guān)系。通過(guò)對(duì)比研究可知:木薯塊根的AGPase對(duì)淀粉積累可能有著至關(guān)重要的促進(jìn)作用,并且木薯塊根的AGPase具有四種同工酶,分別為AGP a、AGP b、AGP c、AGPd,其中AGP a、AGP b、AGP c可能是決定AGPase活性和影響塊根淀粉積累的關(guān)鍵同工酶。
關(guān)鍵詞 木薯;腺苷二磷酸葡萄糖焦磷酸化酶;同工酶;淀粉積累
中文分類號(hào) S533 文獻(xiàn)標(biāo)識(shí)碼 A
The Research of the Relationship Between Starch Accumulation
and the Activity of Cassava's ADP-glucose
Pyrophosphorylase and Its Isozymes
CHEN Huixian1,3, LUO Xinglu1,2 *, CAO Sheng1,3, GUO Yajing1
WANG Zhan1, LUO Xuan1, SHAN Zhongying1
1 Agricultural College, Guangxi University, Nanning, Guangxi 530005, China
2 State Key Laboratory for Conservation and Utilization of Subtropical Agricultural Biological, Nanning, Guangxi 530004, China
3 Academy of Agricultural Sciences, Yulin, Guangxi 537000, China
Abstract The high starch content cassava variety-Fuxuan01 and the low starch content cassava variety-SC124 were used as experimental material ,to research the research of the relationship between starch accumulation and the activity of cassava's ADP- glucose pyrophosphorylase and its isozymes .Through the comparative study ,it could come to a conclusion: AGPase of cassava's tuberous root might have an important role in promoting starch accumulation. AGPase might have four varieties of isozymes, they were AGP a、AGP b、AGP c、AGP d. among them, AGP a、AGP b、AGPc this three varieties of isozymes might be the key isozymes to determine the activity of AGPase, and might be the key isozymes to affect starch accumulation.
Key words Cassava; ADP-glucose pyrophosphorylase; Isozymes; Starch accumulation
doi 10.3969/j.issn.1000-2561.2015.01.016
木薯塊根富含淀粉,素有“地下糧倉(cāng)”的美稱,是世界三大薯類之一。木薯是優(yōu)質(zhì)淀粉作物,又是重要的生物能源作物。廣西是中國(guó)生產(chǎn)木薯的主要省(區(qū)),種植面積占全國(guó)60%,產(chǎn)量占70%。木薯生產(chǎn)是廣西農(nóng)業(yè)特色產(chǎn)業(yè)之一,但是目前廣西木薯生產(chǎn)普遍存在產(chǎn)量低的問(wèn)題,因此如何提高木薯塊根淀粉產(chǎn)量是木薯栽培和品種選育的主要目標(biāo)之一。Dong等[1]通過(guò)研究認(rèn)為,淀粉的合成極有可能是生成的一磷酸葡萄糖(G-1-P)透過(guò)造粉體的雙成膜進(jìn)入到造粉體后被AGPase催化生成腺苷二磷酸葡萄糖(ADPG)。Preiss等[2]認(rèn)為,AGPase是淀粉合成的限速酶。由此可見,AGPase是淀粉合成的關(guān)鍵酶。目前對(duì)AGPase及其同工酶的研究主要集中在小麥上,而對(duì)木薯的AGPase及其同工酶的研究報(bào)道較少,目前只見關(guān)于木薯AGPase酶活性及其同工酶位點(diǎn)檢測(cè)的報(bào)道。研究木薯塊根AGPase及其同工酶活性對(duì)淀粉積累的作用開辟一條木薯高產(chǎn)研究的新途徑,為高淀粉木薯品種的選育和高產(chǎn)高粉栽培的生理調(diào)控提供理論和技術(shù)依據(jù)。……