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叶片黄化
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  “叶片黄化”译为未确定词的双语例句
     Meanwhile, 6-BA could significantly decrease the number of yellow leaves when cultured in the substrate of peat﹕perlite﹕sand = 1﹕1﹕1.
     而在泥炭﹕珍珠岩﹕沙(1﹕1﹕1)介质中,则是6-BA处理的叶片黄化数明显低于其它处理组。
短句来源
     in the Fe level of 0~1μmol/L,with the increase of the Fe concentration, the Fe content of maize shoots decreases, the etiolation of leaves aggravates and chlorophyll content decreases, the Fe concentration making the etiolation of the leaves most severely is about 1μmol/L;
     0~ 1μmol/LFe浓度内随Fe浓度的增加而玉米茎叶Fe含量渐降 ,叶片黄化渐重和叶绿素含量降低 ,尤以 1μmol/LFe浓度处理叶片黄化最重 ;
短句来源
     When the dose of application was 35 ~ 70ml/667m2, most of the 18 varieties tested displayed resistance to the herbicide, while the sensitive wheat cultivars presented phytotoxicity symptoms, such as yellow leaves and dwarfing.
     世玛3%OF施用量为 35—70ml/667m2时,不同品种表现出不同的耐药性,多数品种的耐药性较好,可以使用本药剂,而敏感小麦会产生叶片黄化、植株矮化等药害症状。
     The protein spot (24.5 kD, pI6.30) which had close relationship with etiolation stage should be the specific spot of etiolation stage of leaf.
     (4)蛋白斑点(24.5 kD,pI6.30)为叶片黄化期特异斑点,与该发育阶段密切相关。
短句来源
     Genetic Analysis and Gene Mapping of a Dwarf Mutant with Yellow Leaf in Rice (Oryza Sativa L.)
     水稻叶片黄化矮秆突变体的遗传分析与基因定位
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  相似匹配句对
     The Primary Study Of Leaf Etiolation of Camellia reticulata
     云南山茶叶片黄化初步研究
短句来源
     Wheat Leaf Chlorosis Controlled by a Single Recessive Gene
     单个隐性基因控制的小麦叶片黄化(英文)
短句来源
     leaf> leafstalk.
     叶片>叶柄。
短句来源
     leaf>leafstalk.
     叶片>叶柄。
短句来源
     STUDIES ON CHLOROSIS OF MULBERRY LEAVES
     桑叶黄化失绿症的研究
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  yellowing leaf
A previously uncharacterized virus was reported in southeast Brazil causing a yellowing leaf disease in sugarcane.
      
The disease starts as small areas of yellowing leaf tissue.
      


In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf...

In recent years,a new disease of the foxtail millet (Setaria italica (L.) Beauv.)has been reported to occur in epiphytotic scale in most of the millet growning areasof North China.On account of the brilliant red pigmentation of the infected plant,the disease is generally referred to by the farmers as the red-leaf disease.However,the symptoms on the millet plants varied with different varieties.In general,thecharacteristic symptom exhibited on the "purple-stem" varieties was the the redden-ing of the leaf blade,leaf sheath and spike,particularly the bristle,while that onthe "green-stem" varieties was the yellowing of the leaf blade.In all instances,thediscoloration was usually accompanied by shortening of internode,stunting of thewhole plant.wrinkling of leaf surface,slight waviness of leaf margin,deformationof spike and underdevelopment of root systems.Plants infected at an early stagewere severely stunted and on heads were produced. It has been demonstrated that the red-leaf disease of the foxtail millet was causedby a virus readily transmitted by at least three different species of grain-infestingaphids:corn aphid,Rhopalostiphum maidis Fitch;grain aphid,Macrosiphum granari-um Kirby;and green-bug,Toxoptera graminum Rond.Tests with non-viruliferouscorn aphid eliminated the possibility of direct aphid injury as the cause of the disease. ??The virus was not transmissible by mechanical inoculation,by seeds nor through thesoil. Studies on the mode of transmission of red-leaf virus by corn aphid indicatedthat the virus was persistent in its insect vector and could infect in succession aseries of at least 27 tested millet seedlings.The aphid was unable to acquire thevirus in a 5-minute feedling period on the virus source but was able to pick up thevirus in 10-minute period.The 8-hour acquisition feeding period was optimum forthis aphid.The testing feeding period was found to be not more than 5 minutesand a 4-hour period of confinement on the diseased plant was ample for the aphidto cause maximum infection.Attempts to transmit the virus with cotton aphid.Aphisgossypii Gloner peach aphid,Aphis persicae Sehult and soybean aphid,Aphis glycinesMats,have given negative results.The incubation period for symptoms of the red-leaf virus in foxtail millet ranged from 10 to 32 days with the model period beingbetween 14 to 20 days. Under natural conditions,certain cultivated cereals and grass weeds showed thesymptoms resembling the red-leaf disease of foxtail millet.Among them,were ZeaMays L.,Panicum miliaceum L.,Setaria lutescens (Weigel) Hubb.,S.viridis (L.)Beauv.,Digitaria sanguinalis (L.) Scop.Echinochloa crusgalli (L.) Roem.,Eragrostiscilianensis (All.) Link,E.pilosa (L.) Beauv.,Arundinella anomala Steud,Spodiopogonsibiricus (Steud.) Trin.,Bothruochloa ischaemum (L.) Keng.,Capillipedium parviflor-um (R.Br.) Stapf and Poa practensis L..Artificial inoculation with the corn aphidproved that the first six named plant species,including the two cereals,were susce-ptible to the red-leaf virus and they produced,in all cases,the typical symptoms.Tests with the rest sexen grass weeds are in progress. The results of disease control experiments by timely spraying with an insecticide,E605,under field conditions were inconsistent.Among the 349 foxtail millet varie-ties of foxtail millet examined in the experimental field,nine of them were foundto be highly torelant to and suffered only very slightly from the attack of the red-leaf virus.These varieties were,however,succeptible in aphid transmission experiments. Available evidences point to the conclusion that the red-leaf virus of the foxtail millet herin reported is quite different from all the previously described cereal viruses.Among the cereal virus that closely resembles the red-leaf virus is the yellow-dwarfvirus reported by Oswald tnd Hauston.These two viruses are similar in the follow-ing respects:both are transmissible by the same species of aphids (Rhopalosiphummaidis,Microsiphum graminium andToxoptera granarium) and neither virus can betransferred mechanically.But they differ strikingly from each other in their hostranges.According to Oswald and Hauston,there were 19 of 55 grasses tested thatappeared to be immune from the yellow-dwarf virus.Digitaria sanguinalis,Echino-chloa crus-galli Setaria viridis and Zea Mays were among the immune hosts.On thecontary,all these four gramineous plants were found to be extremely susceptible tothe red-leaf virus both under natural condition and in artificial inoculation experi-ments.Accordingly,the red-leaf,a persistent aphid borne virus affecting the foxtailmillet,is herein reported as a new virus of the cereals.

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、...

小米红叶病是在我国华北分布普遍和为害严重的一种小米病害。病害的症状,在紫杆的小米品种上面,主要的是叶片、叶鞘和穗变紅;在青杆品种上面是叶片黄化。無論如何,紫杆和青杆品种病株除变色外,都可随伴各种畸形,包括植株矮化、叶面绉折、叶綠波状、穗变形和根系發育不良。紅叶病是一个借蚜虫傳播的病毒病害衩籽痢⒙蟪す苎梁吐蠖硌辆軅鞑ゲ『?其中以玉米蚜为最重要。曾經测定玉米蚜在病株上面吸食获得病毒和在健株上面吸食所需最短的时間;带毒玉米蚜的数目和傳病效能的关系谐嵫梁腿舫婢軅鞑 S锰已痢⒋蠖寡梁兔扪羵鞑∥椿竦谜慕Y果。紫杆品种感病后,仅表皮細胞、叶毛細胞和泡状細胞变成紅化,其下层的組織不紅化。叶綠素逐漸消失,但消失过程相当的慢。在病害最末期,維管束內的靱皮細胞少数的坏死,导水管內可能充塞有棕色胶質物,其它細胞無显著的变化。檢查病叶未發現有細胞內含体。用带毒蚜虫作人工接种,証知小米紅叶病病毒能侵染玉米和黍。这两种作物在自然环境下均發生紅叶病。在自然环境下,有以下的禾谷类杂草紅化:金狗尾、青狗尾、馬唐、大画眉草、画眉草、稗、野牯草、大油芒、白羊草、細柄草和六月禾。用玉米蚜作人工接种証明稗、青狗尾、金狗尾、馬唐、六月禾和大油芒均感染小米紅叶病病毒。其它紅化杂草和接种試驗,正在进行中。紅叶病病毒对小米植株所产生的影响,因植株發育的阶段不同而輕重有所差异,植株感病愈早病害愈剧烈。用杀虫剂E605在田間噴射小米防治紅叶病,未能表現药剂有防病的效能,在田間观察349个品种,选得9个高度耐病和农艺性状优良的品种。抗病选种可能是当前防治小米紅叶病最有效的防治措施。根据病原的傳染方法,寄主范围和所表現的症状,小米紅叶病病毒和以往所报道的禾本科植物的病毒病害的病毒均不相同,因此它是禾谷类作物的一个新的病毒。

A yellow type disease occurred on Luo-Han-Kuo ( Momordica grosve-nori Swingle ) . The growth of the diseased plant were severe constrained and the percentage of production reduced to or more than 50%. The leaves of diseased plant became vesicatorious and witches' broom and then turning to yellowish.Electron microscopic observations of the ultrathin sections of the phloem tissuse from the infected leaf vein revealed Mycoplasma-like Organisms ( MLOs ) in the thin-wall cell.The pleomorphic MLOs were around 200-800...

A yellow type disease occurred on Luo-Han-Kuo ( Momordica grosve-nori Swingle ) . The growth of the diseased plant were severe constrained and the percentage of production reduced to or more than 50%. The leaves of diseased plant became vesicatorious and witches' broom and then turning to yellowish.Electron microscopic observations of the ultrathin sections of the phloem tissuse from the infected leaf vein revealed Mycoplasma-like Organisms ( MLOs ) in the thin-wall cell.The pleomorphic MLOs were around 200-800 nm. in diameter, and some of them were apparently in binary fission or budding.These MLOs were found in phloem tissues of diseased but not in the healthy plants, The development of symtom were effectively control by applying Tetracycline at specific conditions.

在罗汉果Momordica grosvenori Swingle植株上发生一种黄化型病害,病株严重地抑制生长和降低产量。病叶起疱、丛枝,最终叶片黄化。 电镜的超薄切片观察;在病叶叶脉维管束中的薄壁细胞中,有多种形态的类菌质体,直径约为200~800毫微米,可以看到二分裂和生芽的菌体。 在病株中可找到MLO_s,而在健株中的上述组织中未发现。 四环素在特定条件下,可以抑制症状。

Tm-2nv is a valuable germplasm which carries the gene Tm-2nv resi-sting to TMV and is widely used as a resistant source in tomato breeding. Considering of its importance in breeding practice we studied it on three aspects.

1.以Tm-2~(nv)为母本的 5个杂交组合的F_1及其亲本的过氧化物酶同工酶酶谱表明,Tm-2~(nv)的酶谱图式明显地有别于5个栽培品种,F_1酶谱倾向于父本,F_2四种不同的表现型与它们各自所具有的酶谱类型之间存在着某种规律性联系。 2.Tm-2~(nv)与大叶早粉叶绿体类囊体膜的叶绿素蛋白质复合体之间无明显差异。Tm-2~(nv)叶片的黄化,不属于叶绿体突变。 3.叶绿体超微结构的研究表明,Tm-2~(nv)叶绿体中基质的含量较之大叶早粉明显增多。这个现象,是否同Tm-2~(nv)的生长缓慢有关,尚待进一步研究。

 
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