root n. 魯特〔姓氏〕。 n. 1.(草木、毛發(fā)等的)根;根菜,食用菜根;根莖,地下莖;塊根;有根植物,草木,草;〔pl.〕根菜類;(山)麓。 2.根本,根源,原因;本質(zhì);基礎(chǔ),根柢;【語言學(xué)】詞根;根詞;【數(shù)學(xué)】根數(shù),根。 3.祖先;【圣經(jīng)】子孫。 4.【音樂】和弦基音。 the root of a tooth 牙根。 the root of all evil 禍根。 the root of a gem 玉根〔毛玉的非玉部分〕。 a cubic [second, square] root 立方[平方]根。 at (the) root 根本上。 be at the root of 是…的根本[基礎(chǔ)]。 by the root(s) 連根,從根部,從根源 (pull up by the roots 連根拔除,根除)。 get at [go to] the root of 追究…的根底,追查…的真相。 lay the axe to the root of 根本改革;治本。 root and branch 完全,都;徹底地,急進(jìn)地。 strike at the root of 打擊…的根部,徹底摧毀。 strike [take] root 生根;扎根;固定,固著。 to the root(s) 充分地;竭力地;徹底地。 vi.,vt. (使)生根;(使)固定;(使)固著;〔比喻〕深深種下,使根深蒂固。 Terror rooted him to the spot. 嚇得他呆立不動。 root up [out] 連根拔除(雜草等);肅清(反叛等)。 adj. 根的;根本的。 a root idea 根本思想。 vt.,vi. (豬等)用鼻子掘(地);搜尋 (for)。 R-, hog, or die. 〔美國〕拚命干啊,不然就得餓死。 vi. 〔美俚〕應(yīng)援,聲援;支持,贊助;歡呼,喝彩。
Both root and root cap are covered by a sheath-like structure called the coleorhiza . 根和根冠被一鞘狀結(jié)構(gòu),即胚根鞘所覆蓋。
They have a physiological role in the root cap and elsewhere , where the starch grains act as statoliths 在根冠及其他部位有重要的生理作用,在那些地方淀粉粒具有平衡石的功能。
Calyptogen a layer of meristematic cells covering the root apical meristem in some plants ( e . g . grasses ) that gives rise to and maintains the root cap 根冠原:在一些植物中覆蓋根頂端分生組織的一層具有分生能力的細(xì)胞,根冠原可以產(chǎn)生和維持根冠。
After the period of treatments were prolonged for three days , the contain of sugar reduced again . the growth of roots and plants were retarded severely and the ratios of root cap were increased manifestly . the ratios of root - shoot was stability and the growth almost stopped at the later period of peg ( 6000 ) treatment 牛心樸子根系發(fā)達(dá),根冠比大,在土壤水分變化時,植株地上部比較敏感,隨土壤水分脅迫程度的加強(qiáng)和脅迫時間的延長,植株生長顯著變緩,直至停止生長,而根冠比值則有所加大。
The result showed that physiological response were mainly affected by concentration of peg and less affected by time of peg ( 6000 ) treatment . relative water content of leaves root activity , and growth of roots and plants showed a less reduction under 10 - 20 % peg ( 6000 ) treatment , but ratios of root cap , and contains of soluble sugar , contain of pro and potassium showed a less increase . all those just described indexes showed a marked change under 25 % peg treatment 在10 20的peg濃度脅迫下,葉片相對含水量、根系活力、根系及地上部生長量下降的幅度較??;根冠比、可溶性糖、脯氨酸( pro ) 、 k ~ +上升的幅度也較小,而在25的peg濃度脅迫下上述指標(biāo)發(fā)生了很顯著的變化,葉片相對含水量、根系活力明顯下降,可溶性糖最大含量出現(xiàn)的時間較20濃度脅迫的提早3d ,且較20時的最大含量小,并在延長處理3d后又開始下降,根系和地上部的生長受到嚴(yán)重抑制,且地上部影響大于根系,根冠比顯著增大,脅迫后期趨于恒定狀態(tài),生長幾乎完全停止。
英文解釋
thimble-shaped mass of cells covering and protecting the growing tip of a root
百科解釋
The root cap is a section of tissue at the tip of a plant root. It is also called calyptra.