作物学报
作物學報
작물학보
ACTA AGRONOMICA SINICA
2014年
11期
1973-1979
,共7页
王小丽%杜建中%郝曜山%张丽君%赵欣梅%王亦学%孙毅
王小麗%杜建中%郝曜山%張麗君%趙訢梅%王亦學%孫毅
왕소려%두건중%학요산%장려군%조흔매%왕역학%손의
玉米%BADH基因%转基因%耐盐性%形态指标%生理指标
玉米%BADH基因%轉基因%耐鹽性%形態指標%生理指標
옥미%BADH기인%전기인%내염성%형태지표%생리지표
Maize%BADH gene%Genetic transformation%Salt tolerance%Morphological index%Physiology index
采用超声波辅助花粉介导植物转基因方法,将甜菜碱醛脱氢酶(BADH)基因导入玉米自交系郑58,获得了耐盐性强的转基因玉米植株。经卡那霉素抗性初筛、PCR扩增、Southern blot分析,证明BADH基因已导入转化植株并整合到其基因组中。用不同浓度的NaCl溶液对T2代转基因玉米植株与对照进行盐胁迫处理,结果表明,转BADH基因玉米植株表现出一定的抗逆性,生长状况明显优于对照;根据非转化苗对 NaCl 的反应以及生长状况,确定250 mmol L–1 NaCl溶液为玉米幼苗耐盐性筛选的适宜浓度;依据此临界浓度下形态指标和生理生化指标的测定结果,与对照相比,转基因植株的株高提高10.94%~25.70%,鲜重增加8.62%~18.20%,干重增加9.00%~18.18%,相对电导率降低37.21%~58.14%,叶绿素含量增加15.89%~90.65%,超氧化物歧化酶(SOD)活性提高64.92%~148.29%,丙二醛(MDA)含量减少26.97%~48.05%。综上所述,转入甜菜碱醛脱氢酶(BADH)基因提高了玉米的耐盐性。这是首例将BADH基因导入优良玉米自交系郑58的报道。超声波辅助花粉介导法是一种经济、高效、实用和无基因型依赖性的植物基因转化方法。
採用超聲波輔助花粉介導植物轉基因方法,將甜菜堿醛脫氫酶(BADH)基因導入玉米自交繫鄭58,穫得瞭耐鹽性彊的轉基因玉米植株。經卡那黴素抗性初篩、PCR擴增、Southern blot分析,證明BADH基因已導入轉化植株併整閤到其基因組中。用不同濃度的NaCl溶液對T2代轉基因玉米植株與對照進行鹽脅迫處理,結果錶明,轉BADH基因玉米植株錶現齣一定的抗逆性,生長狀況明顯優于對照;根據非轉化苗對 NaCl 的反應以及生長狀況,確定250 mmol L–1 NaCl溶液為玉米幼苗耐鹽性篩選的適宜濃度;依據此臨界濃度下形態指標和生理生化指標的測定結果,與對照相比,轉基因植株的株高提高10.94%~25.70%,鮮重增加8.62%~18.20%,榦重增加9.00%~18.18%,相對電導率降低37.21%~58.14%,葉綠素含量增加15.89%~90.65%,超氧化物歧化酶(SOD)活性提高64.92%~148.29%,丙二醛(MDA)含量減少26.97%~48.05%。綜上所述,轉入甜菜堿醛脫氫酶(BADH)基因提高瞭玉米的耐鹽性。這是首例將BADH基因導入優良玉米自交繫鄭58的報道。超聲波輔助花粉介導法是一種經濟、高效、實用和無基因型依賴性的植物基因轉化方法。
채용초성파보조화분개도식물전기인방법,장첨채감철탈경매(BADH)기인도입옥미자교계정58,획득료내염성강적전기인옥미식주。경잡나매소항성초사、PCR확증、Southern blot분석,증명BADH기인이도입전화식주병정합도기기인조중。용불동농도적NaCl용액대T2대전기인옥미식주여대조진행염협박처리,결과표명,전BADH기인옥미식주표현출일정적항역성,생장상황명현우우대조;근거비전화묘대 NaCl 적반응이급생장상황,학정250 mmol L–1 NaCl용액위옥미유묘내염성사선적괄의농도;의거차림계농도하형태지표화생리생화지표적측정결과,여대조상비,전기인식주적주고제고10.94%~25.70%,선중증가8.62%~18.20%,간중증가9.00%~18.18%,상대전도솔강저37.21%~58.14%,협록소함량증가15.89%~90.65%,초양화물기화매(SOD)활성제고64.92%~148.29%,병이철(MDA)함량감소26.97%~48.05%。종상소술,전입첨채감철탈경매(BADH)기인제고료옥미적내염성。저시수례장BADH기인도입우량옥미자교계정58적보도。초성파보조화분개도법시일충경제、고효、실용화무기인형의뢰성적식물기인전화방법。
In order to obtain transgenic maize plants tolerant to salt stress, maize inbred Zheng 58 was transformed with BADH gene using pollen-mediated method. The results of Km-resistant screening, PCR detection and Southern blot analysis proved that BADH gene was introduced into maize plants and integrated into the maize genome. Effects of various concentrations of NaCl solution on the growth of T2 transgenic and non-transgenic maize plants were investigated.The results indicated that transgenic maize seedlings had an improved resistance to salt stress, and their growth performance was superior to that of non-transgenic maize seedlings. On the basis of the growth status of non-transgenic plants, 250 mmol L–1 of NaCl solution was used to screen transgenic plants. An analysis on morphological and physiological indexes under the stress of 250 mmol L–1 NaCl showed that compared with non-transgenic plants, the seedling height of transgenic plants was increased by 10.94%–25.70%, fresh weight was increased by 8.62%–18.20%, dry weight was increased by 9.00%–18.18%, relative conductivity was decreased by 37.21%–58.14%, chlorophyll content was increased by 15.89%–90.65%, superoxide dismutase (SOD) activity was increased by 64.92%–148.29%, and MDA content was decreased by 26.97%–48.05%. In conclusion, introducing betaine aldehyde dehydrogenase (BADH) gene enhances salt tolerance in maize plants. This is the first report on introducing BADH gene into the elite maize inbred Zheng 58. This study suggests that pollen-mediated transformation approach is an economical, effective and practical plant trans-formation method without genotype dependence.