2 effects of light quality and kt on hypocotyl elongation the hypocotyl elongation of 2 - d - old etiolated seedlings was inhibited evidently under continuous light including uv - b , wl , bl , fr and rl . the inhibition effectiveness was uv - b > wl > bl > fr > rl 二、光质和kt对下胚轴伸长的影响不同光质持续照光对2天龄黄化下胚轴伸长有明显的抑制，不同光质对伸长抑制的效应表现为uv - b wl bl fr rl 。
The iaa contents in shoots and roots of 12 - d - old seedlings of arabidopsis wt and mutants were assayed . high eth level ( in eto1 - 1 ) showed the promotion of iaa synthesis or inhibition of the iaa catabolism , thus improves the root gravitropism 从12d龄拟南芥幼苗的形态学表现上看， etol - 1根的向重力性与wt相比明显增强了，而eirl - 1和etrl - 3的向重力性则明显减弱，黄化的etrl - 3茎的负向重力性也减弱。
1 . characteristic properties of the plasma membrane h + - atpase 3 - d - old seedlings of etiolated mung bean ( vigna radiata l ) were harvested and the hypocotyls ( 1 - 2 cm in length ) under hook were used to prepare the plasma membrane vesicles by means of aqueous two - phase partition 绿豆下胚轴质膜h ~ + - atpase基本特性的研究黑暗条件下生长三天龄的绿豆黄化幼苗，取弯钩下1 - 2cm长的下胚轴，机械法破碎组织，两相分配法分离、提取和纯化质膜。
The study reveals that the infected soil is of high ph value and low effective iron content and the afore - said infected trees and plants suffer from a deficiency of iron for their normal growth , as the alkali soil is lack of effective iron , and the insufficiency in turn weakens the rhizome of the trees to absorb iron effectively and impedes the movement of iron along the trunk and branches 结果表明：舟山市朱家尖苗木基地红楠黄化是由于基地土壤呈碱性，致使土壤中缺少有效态铁，影响了根系对铁的吸收和铁在树体内的移动及有效性，不能满足红楠正常生长对铁的需要而引起的缺绿黄化症。
The typi ca1 symptom j s fold and b1 istering , even d istortj on , 1ops i ded j ] ] - - ] eaf , shorti ng p ] ant , there are motley with 1ight green and deep green , and some of the mot ] ey are ye1wt mm 1eave m tny : the i ] . 1 - - 1ed has arias mosai c , 1ops i ded , and the tissue of the i11 - - 1eaf has deteriorated exceeding1y , with s1ender pteridophyte 1 . eaves , i l1 p1ant is green - - yei 1ow , obvious1y shortened in joint , the who1e p1ant serious1y shortened and grows thickly 南瓜病毒病的典型症状为皱缩有疱斑、甚至扭曲，病叶畸形，植株矮化；花叶叶片上出现淡绿色和深绿色相间的斑驳，有的斑驳明显黄化；蕨叶丛枝型：病叶不但严重花叶、畸形，而且叶肉组织极度退化，纤细呈蕨叫叶状，病株黄绿色，节间明显缩短，整个植株严重矮化丛枝状。
Yellow - green or yellow chlorosis or brown necrosis in basal areas of older and expanding leaves ; margins curled downwards and leaf expansion irregular and suppressed ; chlorosis and necrosis spreading into interveinal areas of older leaves ; youngest leaves distorted , necrotic and failing to expand ; petioles truncated ; death of stem growing point 西葫芦缺硼:老叶和正展开叶的基部黄绿色或黄化或变褐坏死,边缘向下卷曲和叶片展开不规则和抑制,色斑和坏死斑散布在老叶叶脉间,心叶扭歪、坏死、无法展开,茎生长点枯死
In solution culture , evident chlorosis symptoms were observed in the leaves of p . trifoliata after 4 weeks of iron deficiency treatment , while no chlorosis symptoms were observed in the leaves of " iron efficient " c . junos under the same culture conditions . the content of leaf chlorophyll and active iron in c . junos was much higher than that of p . trifoliata . however , iron content of chlorotic leaves of p . trifoliata was found to be even higher than that of the green leaves of p . trifoliata and c . junos 枳在缺铁营养液中培养4周即可出现明显缺铁症状，而生长在同样时间内和同样缺铁培养液中的香橙观察不到任何缺铁症状，香橙的叶片叶绿素和活性铁含量均极显著高于枳；但枳的黄化叶片的总铁含量高于香橙和枳的绿色叶片。
