浙江农业学报
浙江農業學報
절강농업학보
ACTA AGRICULTURAE ZHEJIANGENSIS
2014年
4期
954-960
,共7页
干旱胁迫%白刺花%亚精胺%叶片
榦旱脅迫%白刺花%亞精胺%葉片
간한협박%백자화%아정알%협편
drought stress%Sophora davidii%spermidine
以白刺花（Sophora davidii）为试材，采用培养液栽培的方法研究了8.5％聚乙二醇（PEG）模拟的干旱胁迫下喷施外源亚精胺（ Spd）对白刺花幼苗生长的影响。结果表明，外源亚精胺对干旱胁迫下白刺花叶片色素含量、叶片相对含水量、净光合速率和蒸腾速率均具有改善效果，在高浓度（ T5和T6）时更为显著。总之，Spd浓度在0～0.50 mmol· L-1时，随着Spd浓度的增加，干旱胁迫下白刺花叶片的各生理指标数值逐渐升高：叶绿素a和叶绿素b在Spd为0.10 mmol· L-1时含量最高，分别比对照组增加了12.80％和8.75％；在Spd浓度为0.50 mmol· L-1时对净光合速率效果最明显，处理后1，3，5 d分别比T1增加了47.35％，62.65％和74.64％；在Spd浓度为0.50 mmol· L-1时，处理后1，3，5 d叶片的蒸腾速率分别比对照组（ CK）提高了21.32％，13.44％和13.69％。
以白刺花（Sophora davidii）為試材，採用培養液栽培的方法研究瞭8.5％聚乙二醇（PEG）模擬的榦旱脅迫下噴施外源亞精胺（ Spd）對白刺花幼苗生長的影響。結果錶明，外源亞精胺對榦旱脅迫下白刺花葉片色素含量、葉片相對含水量、淨光閤速率和蒸騰速率均具有改善效果，在高濃度（ T5和T6）時更為顯著。總之，Spd濃度在0～0.50 mmol· L-1時，隨著Spd濃度的增加，榦旱脅迫下白刺花葉片的各生理指標數值逐漸升高：葉綠素a和葉綠素b在Spd為0.10 mmol· L-1時含量最高，分彆比對照組增加瞭12.80％和8.75％；在Spd濃度為0.50 mmol· L-1時對淨光閤速率效果最明顯，處理後1，3，5 d分彆比T1增加瞭47.35％，62.65％和74.64％；在Spd濃度為0.50 mmol· L-1時，處理後1，3，5 d葉片的蒸騰速率分彆比對照組（ CK）提高瞭21.32％，13.44％和13.69％。
이백자화（Sophora davidii）위시재，채용배양액재배적방법연구료8.5％취을이순（PEG）모의적간한협박하분시외원아정알（ Spd）대백자화유묘생장적영향。결과표명，외원아정알대간한협박하백자화협편색소함량、협편상대함수량、정광합속솔화증등속솔균구유개선효과，재고농도（ T5화T6）시경위현저。총지，Spd농도재0～0.50 mmol· L-1시，수착Spd농도적증가，간한협박하백자화협편적각생리지표수치축점승고：협록소a화협록소b재Spd위0.10 mmol· L-1시함량최고，분별비대조조증가료12.80％화8.75％；재Spd농도위0.50 mmol· L-1시대정광합속솔효과최명현，처리후1，3，5 d분별비T1증가료47.35％，62.65％화74.64％；재Spd농도위0.50 mmol· L-1시，처리후1，3，5 d협편적증등속솔분별비대조조（ CK）제고료21.32％，13.44％화13.69％。
Sophora davidii was used as the test material , to study effects of exogenous spermidine on the growth of Sophora davidii seedlings under drought stress simulated by 8.5% polyethylene glycol (PEG).The results showed that the chlorophyll content , leaf relative water content , net photosynthetic rate and transpiration rate in Sophora davidii were improved by exogenous spermidine under drought stress , which was more significant at high concentrations (T5 and T6).In short, when Spd concentration was 0.00-0.50 mmol· L-1, the physiological index values gradually increased with increasing concentrations of Spd under drought stress . The concentration of chlorophyll-a and chlorophyll-b were the highest in the 0.10 mmol· L-1 Spd, which were 12.80% and 8.75%higher than the control .The net photosynthetic rate increased by 47.35%, 62.65% and 74.64% when compared with T1 on 1, 3 and 5 d in the treatment of 0.5 mmol· L-1 Spd; meanwhile, the transpiration rate increased by 21.32%, 13.44%and 13.69%on 1, 3 and 5 d compared with the control group (CK).
