CAJ | 학술논문

[目的]为桃树优质、高产栽培提供理论依据.[方法]以2年生盆栽桃树为试材,对其进行不同程度的水分胁迫处理(CK:浇水500 ml/d;处理Ⅰ:浇水2 000 ml/d;处理Ⅱ:浇水200 ml/d),研究不同处理对桃树叶片氮代谢相关指标的影响.[结果]水分胁迫处理20 d后,处理Ⅰ、Ⅱ桃树叶片可溶性蛋白含量分别较CK下降了10.6%和14.3%,游离脯氨酸含量分别较CK增加了40.3%和20.5%,硝酸还原酶(NR)活性分别较CK下降了34.2%和62.2%,谷氨酰胺合成酶(GS)活性分别较CK下降了29.7%和60.7%;谷氨酸合成酶(GOGAT)活性与GS活性的变化趋势相同,谷氨酸脱氢酶(GDH)活性先升高后降低.[结论]水分胁迫处理后,桃树叶片可溶性蛋白含量降低,游离脯氨酸含量增加,NR、GOGAT、GS活性降低.
[목적]위도수우질、고산재배제공이론의거.[방법]이2년생분재도수위시재,대기진행불동정도적수분협박처리(CK:요수500 ml/d;처리Ⅰ:요수2 000 ml/d;처리Ⅱ:요수200 ml/d),연구불동처리대도수협편담대사상관지표적영향.[결과]수분협박처리20 d후,처리Ⅰ、Ⅱ도수협편가용성단백함량분별교CK하강료10.6%화14.3%,유리포안산함량분별교CK증가료40.3%화20.5%,초산환원매(NR)활성분별교CK하강료34.2%화62.2%,곡안선알합성매(GS)활성분별교CK하강료29.7%화60.7%;곡안산합성매(GOGAT)활성여GS활성적변화추세상동,곡안산탈경매(GDH)활성선승고후강저.[결론]수분협박처리후,도수협편가용성단백함량강저,유리포안산함량증가,NR、GOGAT、GS활성강저.
[Objective] The study was to provide the theoretical basis for high quality and yield cultivation of peach. [Method] With 2-year-old pot peaches as the materials, they were treated by water stress in different degree (CK: watering 500 ml/d; treatmentⅠ: watering 2 000 ml/d; treatmentⅡ: watering 200 ml/d). And the effects of different treatments on nitrogen metabolism indexes of peach leaves were studied. [Result] After 20 d of water stress, the contents of soluble protein in peach leaves of treatment ⅠandⅡ were decreased by 10.6% and 14.3% than that of CK resp., the contents of free proline were increased by 40.3% and 20.5% than that of CK resp., the activities of NR were decreased by 34.2% and 62.2% than that of CK resp. and the activities of GS were decreased by 29.7% and 60.7% than that of CK resp. The changing trend of activity of GOGAT was similar with that of GS. The activity of GDH was increased at first and then decreased. [Conclusion] After water stress, the content of soluble protein in peach leaves was decreased, the content of free proline was increased and the activities of NR, GOGAT and GS were decreased.