CAJ | 학술논문

以采自陕西杨陵和安塞的2个1年生酸枣幼苗为材料,采用盆栽称重控水法研究了中度和重度土壤干旱胁迫对它们生长和生理特性的影响.结果表明,不同程度的水分胁迫均使2种源酸枣新生侧枝长度受到极显著抑制,其苗高和基径也受到一定程度抑制,同时分别使叶片相对含水量和水分饱和亏有一定程度的降低和升高;2种源酸枣叶片的叶绿素a含量在各水分胁迫均极显著降低,它们的总叶绿素含量也在重度干旱下显著降低;随土壤干旱胁迫时间的延续,2种源酸枣叶片保护酶SOD、CAT、APX活性上下波动,其脯氨酸和可溶性糖含量逐渐升高,而超氧阴离子含量在较低水平下波动,丙二醛含量逐渐降低.杨陵酸枣在土壤水分较好的条件下表现良好,而安塞酸枣则具有更强的适应旱生能力.研究发现,在不同程度的土壤干旱胁迫下,2个种源酸枣的生长均受到一定程度的抑制,但它们均能调节自身的保护酶系统活性和渗透调节物质含量来减轻干旱伤害,维持植物体的正常生理代谢功能,表现出较强的抗旱耐旱能力.
이채자협서양릉화안새적2개1년생산조유묘위재료,채용분재칭중공수법연구료중도화중도토양간한협박대타문생장화생리특성적영향.결과표명,불동정도적수분협박균사2충원산조신생측지장도수도겁현저억제,기묘고화기경야수도일정정도억제,동시분별사협편상대함수량화수분포화우유일정정도적강저화승고;2충원산조협편적협록소a함량재각수분협박균겁현저강저,타문적총협록소함량야재중도간한하현저강저;수토양간한협박시간적연속,2충원산조협편보호매SOD、CAT、APX활성상하파동,기포안산화가용성당함량축점승고,이초양음리자함량재교저수평하파동,병이철함량축점강저.양릉산조재토양수분교호적조건하표현량호,이안새산조칙구유경강적괄응한생능력.연구발현,재불동정도적토양간한협박하,2개충원산조적생장균수도일정정도적억제,단타문균능조절자신적보호매계통활성화삼투조절물질함량래감경간한상해,유지식물체적정상생리대사공능,표현출교강적항한내한능력.
With two provenances of one-year-old wild sour jujube seedlings,named as "SY" form Yangling and "SA" from Ansai in Shaanxi,the effects of water stress on growth and physiological characteristics were studied with controlling water by potted planting.The results showed that water stress decreased the height,basal diameter and newborn lateral branch,and decreased the contents of chlorophyll a (Chl a),chlorophyll b (Chl b) and relative water content (RWC) of leaves on two provenances of seedlings.With the stretch of stress,the activities of protective enzyme,including superoxide dismutase (SOD),catalase (CAT) and ascorbate peroxidase (APX),are in the state of fluctuation,proline and soluble sugar contents increased slowly,which kept superoxide anion (O-·2) down in a low level,and malondialdehyde (MDA) content decreased.The SY seedling showed better under adequate soil water content,and the SA seedling showed better drought-adaptability potential.Both of them were drought-resistant.