摘要
以球花石楠2 a生实生苗为试材,分别进行良好水分处理(100%田间持水量),干旱处理(50%田间持水量)及盐处理(0.1 mol/L NaCl溶液),测定其部分生理生化指标。结果表明:干旱及盐胁迫引起植株光合色素含量的改变,叶绿素含量及类胡萝卜素含量在干旱胁迫下均有所降低,而在盐胁迫下均有所增加。盐胁迫刺激了膜质过氧化产物丙二醛含量的增加,同时也显著提高了过氧化氢酶(CAT)和抗坏血酸过氧化物酶(APX)的活性;干旱胁迫仅增加了过氧化氢酶(CAT)的活性,对丙二醛含量的影响不显著;渗透调节物质脯胺酸含量在干旱胁迫和盐胁迫下均显著增加。此外,综合所测指标分析,盐胁迫对球花石楠幼苗的影响要大于干旱胁迫。
The two-year old seedlings of Photinia glomerata Rehd.et Wils.as experiment materials,the physiological traits as affected by drought and salt under three treatments（well-watered,100%field capacity;drought stress,50%field capacity;salt stress by 0.1 mol/L NaCl solution） were studied.The results showed that the contents of photosynthetic pigments were very different under three treatments.Compared with control treatment,the contents of chlorophyll and carotenoid were lower under drought treatment while higher under salt treatment.Moreover,salt stress significantly stimulated MDA accumulation,at the same time,it activated the antioxidative system of plant and improved the activities of CAT and APX;drought stress improved the activity of CAT enzyme while the drought effect on MDA content was not significant.Furthermore,the free proline content significantly increased under drought and salt stresses.
出处
《北方园艺》
CAS
北大核心
2010年第21期87-89,共3页
Northern Horticulture
基金
云南省部级重点学科省高校重点实验室及校实验室共享平台资助项目
关键词
球花石楠幼苗
干旱胁迫
盐胁迫
生理生化
Photinia glomerata seedlings
drought stress
salt stress
physiology and biochemistry
