摘要
为明确干旱胁迫对不同育苗方式下烟苗移栽后的生长状况及生理生化特性的影响,通过盆栽控制土壤含水率试验,研究了干旱缺水环境下烤烟的适宜育苗方式。结果表明:干旱胁迫下,烟株脯氨酸含量和过氧化物酶活性两项指标均呈现出上升趋势。随着干旱时间的持续以及干旱程度的加深,烟株的硝酸还原酶活性则呈下降趋势。在轻度干旱条件下,漂湿育苗方式培育的烟苗移栽后生长状况好于漂浮育苗方式培育的烟苗。在极端干旱条件下,烟苗移栽14 d后,两种育苗方式的烟株生长均停滞并出现叶片变黄枯萎等现象。
For investigating the influence of drought stress on the growth, physiological and biochemical characteristics of transplanted seedlings cultured in different seedbed systems, the pot trials with controlled soil moisture content were conducted to study the seedbed systems for fluecured tobacco seedlings adaptable to drought conditions. The results showed that the proline content and POD activity in tobacco plants presented a rising trend under drought stress. With the increase of duration and degree of drought, the activity of NR in tobacco plants decreased. Under the condition of moderate drought, the growth status of transplanted tobacco seedlings from float-moist seedbed was better than that from floating system; while under extremely drought condition, the growth of tobacco plants from both two seedbed systems stagnated, yellowing and wilting leaves emerged 14 days after transplanting.
出处
《烟草科技》
EI
CAS
北大核心
2011年第8期84-88,共5页
Tobacco Science & Technology
基金
云南省烟草公司资助项目"烟草漂湿育苗技术研究与推广"(YN20080107)
关键词
烤烟
育苗
干旱胁迫
Tobacco
Seedling culture
Drought stress
