CAJ | 학술논문

用相对耐寒的2个木薯品种华南124和Arg7为材料,设置14℃弱低温驯化后4℃伤害处理、非驯化直接4℃处理和25℃对照,观察和测定了木薯在低温驯化处理下的形态与生理变化。结果表明,该2个品种经低温驯化处理后比非驯化处理,植株形态损伤减轻,恢复正常温度后形态恢复力增强;叶片中的叶绿素含量下降延缓、脯氨酸含量增幅高而丙二醛含量指示的细胞膜破损变小;而在温度恢复过程中叶绿素含量、叶片脯氨酸含量增加均较快。形态与生理指数一致表明,弱低温驯化能够有效提高木薯对低温的适应能力及恢复能力。
용상대내한적2개목서품충화남124화Arg7위재료,설치14℃약저온순화후4℃상해처리、비순화직접4℃처리화25℃대조,관찰화측정료목서재저온순화처리하적형태여생리변화。결과표명,해2개품충경저온순화처리후비비순화처리,식주형태손상감경,회복정상온도후형태회복력증강;협편중적협록소함량하강연완、포안산함량증폭고이병이철함량지시적세포막파손변소;이재온도회복과정중협록소함량、협편포안산함량증가균교쾌。형태여생리지수일치표명,약저온순화능구유효제고목서대저온적괄응능력급회복능력。
Double cassava varieties Southern China 124 and Arg 7 with higher tolerance to coldness were used in cold acclimation experiments under 4 treatments AT （acclimation treatment）, AH （acclimation hurt）, NAH （non-acclimation hurt） and NC （negative control）. The morphological and physiological responses showed that cold acclimation decreased damage of leave in stress and increased the morphological restoration ability after the stress. The chlorophyl lost were minimized, proline content significant increased and the content of malondialdehyde which of indicator of broken membrane was not so high compared to un-acclimation treat. Meanwhile, the chlorophyl and praline increasing were faster than check during the process of restoration at normal temperature. This experiment identified that cold acclimation could enhance tolerance to cold stress and recovery capability of cassava. How to explore the molecular genetic mechanism of the acclimation by lower temperature stress was discussed in the paper.