根尖

• Under the condition of the enhanced ultraviolet - b radiation , the phenomenon of abnormal mitosis was first discovered , such as the three - bundle > four - bundle and six - bundle division of the chromosome when the cell is in anaphase
  并在uv - b诱导的小麦根尖细胞中，首次发现染色体在有丝分裂的后期到末期，分成3束、 4束和6束等异常分裂新类型。
• It is easy to induce callus derived from hypocotyls and cotyledons , but callus derived from root tip was rather difficult to be done . the most suitable medium for callus induction was the ms medium containing ba 0 . 5 mg / l and l . omg / l naa
  愈伤组织的诱导与再分化的研究显示： “种都一号”儿菜下胚轴与子叶愈伤组织诱导较容易，但根尖很难愈伤化。
• Another choice for solving mucogingival problems 15 the use of a modified combination of three known techniques : the split thickness flap ( apically replaced ) , vestibular extension and intemal linear periosteal fenestration
  摘要本改良法乃是综合齿龈半厚瓣根尖移位、口腔前庭加宽和骨膜线状开窗等已知的三种的方法于一次齿龈粘膜手术之同时进行的术式。
• However , according to root tip relative ul rates ( rulrs ) , these cultivars can be divided into five types such as highly al - resistant cultivars , al - resistant cultivars , intermediate cultivars , al - sensitive cultivars , and highly al - sensitive cultivars
  根相对伸长率与根尖相对发光率之间具有正相关性( r = 0 . 63295 ) 。并且根尖相对发光率比根相对伸长率更为灵敏。
• Increased citrate efflux due to the sa treatment was associated with decreased inhibition of root growth and al content in root tips , suggesting that exogenous sa could confer al tolerance by increasing citrate efflux
  由于sa增加al诱导的柠檬酸的分泌，因此明显降低了根尖内al的含量，改善了铝对根生长的抑制，表明sa可以通过增加柠檬酸的分泌来提高c . tora对铝的抗性。
• We also examined cs and aco activities , however , activities of both enzymes remained unaffected . these results indicated that sa - promotion of al - induced citrate efflux might be not correlated with increases in citrate production
  但5 mol lsa对根尖内cs和aco活性并无显著影响，说明sa增加铝诱导的柠檬酸的分泌可能不是通过柠檬酸生物合成能力的提高或抑制其降解途径而实现的。
• On the one hand , quercetin promotes hypocqtyls phototropic growth , on the other hand , it promotes gravitropism of root tips . when the seedlings are placed tilted at 80 , quercetin induces root tips getting into medium , while on control case , it grows along the surface
  一方面q促进了下胚轴的向光生长，另一方面，促进了根尖的向地性，在80培养时， q诱导根尖钻入培养基中。