CAJ | 학술논문

探究了 KCl对干旱胁迫下马铃薯幼苗抗旱性的影响及其机制。研究结果表明：增施 KCl （0．70 g·株-1）显著缓解干旱胁迫下马铃薯幼苗叶片相对含水量和叶绿素含量的降低，抑制叶片MDA含量和相对电导率的升高，相对提高叶片脯氨酸含量、可溶性糖含量、抗氧化酶（SOD、CAT ）活性、净光合速率和水分利用效率；增施KCl还相对提高了马铃薯的株高、基径、单株匍匐茎数量和单株产量，增施氯化钾使干旱胁迫条件下马铃薯植株株高、茎粗、单株匍匐茎数和单株产量分别相对提高6．32％、18．28％、13．75％和29．45％。由此可以认为，在干旱条件下增施氯化钾可通过提高马铃薯幼苗的保水能力，缓解干旱胁迫造成的抗氧化酶活性下降并相对提高渗透调节物质含量，减轻干旱胁迫对光合作用和生长发育的不良影响，从而显著提高马铃薯幼苗的抗旱性。
탐구료 KCl대간한협박하마령서유묘항한성적영향급기궤제。연구결과표명：증시 KCl （0．70 g·주-1）현저완해간한협박하마령서유묘협편상대함수량화협록소함량적강저，억제협편MDA함량화상대전도솔적승고，상대제고협편포안산함량、가용성당함량、항양화매（SOD、CAT ）활성、정광합속솔화수분이용효솔；증시KCl환상대제고료마령서적주고、기경、단주포복경수량화단주산량，증시록화갑사간한협박조건하마령서식주주고、경조、단주포복경수화단주산량분별상대제고6．32％、18．28％、13．75％화29．45％。유차가이인위，재간한조건하증시록화갑가통과제고마령서유묘적보수능력，완해간한협박조성적항양화매활성하강병상대제고삼투조절물질함량，감경간한협박대광합작용화생장발육적불량영향，종이현저제고마령서유묘적항한성。
Effect of potassium chloride (KCl ) on drought resistance of potato seedlings were investigated .The re-sults showed that KCl relieved the typical symptom of leaf produced by drought ,such as maintaining contents of water , chlorophyll ,and MDA and increasing the contents of proline and soluble sugar and the activities of superoxide dismutase (SOD ) and catalase (CAT ) .In addition ,it decreased transpiration rate ,whereas improved the net photosynthetic rate , water use efficiency and the contents of starch and vitamin C .Plant height ,base diameter ,stolon number and yield per plant were increased by 6 .32% ,18 .28% ,13 .75% ,and 29 .45% ,respectively ,when applying 0 .7g KCl/seedling . In summary ,KCl help to develop effective resistance of potato seedling to drought by improving the water retaining capac-ity and activating the antioxidative system .