摘要
研究了粗毛鳞盖蕨(Microlepia strigosa)成熟孢子体在自然干旱胁迫处理下生理特性的变化。发现胁迫过程中其相对电导率、过氧化物酶(POD)活性、可溶性糖、脯氨酸含量上升;可溶性蛋白与丙二醛(MDA)含量先升高后降低再升高;超氧化物歧化酶(SOD)活性、叶绿素含量、总呼吸速率、净光合速率(Photo)、蒸腾速率(Trmmol)、气孔导度(Cond)呈下降趋势;CAT活性、胞间CO2浓度(Ci)呈先升后降的趋势。表明其膜系统并未受到严重伤害;渗透调节系统起到了较好的抗脱水作用;保护酶系统虽受到抑制,但仍能发挥清除自由基的作用;呼吸及光合系统受到影响显著下降,但主要表现为植物体的自主调节。说明在胁迫过程中粗毛鳞盖蕨生理上能够迅速作出相应的适应调节,表现出对干旱胁迫后较强的恢复能力和一定的忍耐能力。
Research on Microlepia strigosa under natural drought stress treatment exhibited changes in physical properties. Stress increased relative conductivity, P^D activity, soluble sugar and proline content. Soluble protein and MDA content high-low-high; SOD activity, chlorophyll content, total respiratory rate, net photosynthetic rate Intercellular CO2 concentration and stomatal conductance is on the decline; The CAT activity and Transpiration rate is raise-lower. The membrane system did not exhibit serious damage. The osmotic regulation system had good resistance to dehydration. The protective enzyme system played a role against free radicals; respiration and photosynthesis decreased significantly, but mainly for autonomic regulation of the plant. Results demonstrated that M. strigosa adapted to stress, and showed a strong ability of recovery after drought and exhibited certain endurance ability.
出处
《植物科学学报》
CAS
CSCD
北大核心
2013年第6期576-582,共7页
Plant Science Journal
基金
国家自然科学基金资助项目(31170294)
关键词
粗毛鳞盖蕨
成熟孢子体
干旱胁迫
生理特性
Microlepia strigosa
Mature sporophyte
Drought stress
Physiological characteristics
