摘要
为了解空气湿度对高温下番茄幼苗的生理影响，试验设计制作了智能控制自然光照生长箱，在夏季高温时段（10：00—16：00）设置了3种湿度处理，即空气相对湿度55％±5％（M处理）、70％±5％（H处理）和以不加湿作为对照（L处理）。结果表明，在平均温度为33℃的高温条件下，各处理番茄叶片中渗透调节物质（脯氨酸、可溶性糖、可溶性蛋白）的积累、POD活性都呈增加趋势，说明植株在不断的自我适应和调节；随处理时间延长，L处理和M处理的细胞膜相对透性增加，而H处理的细胞膜相对透性降低；而且处理期间，H处理的脯氨酸含量比L处理减少25％～700o，POD活性低14％～32％，说明植株在70％±5％的空气湿度下遭受的热胁迫较小，热害指数降低，耐热性提高。
In order to study the physiological effects of air humidity on the heat stress of tomato seed lings, 3 levels of air humidity treatment including non-humidification （L treatment, CK）, 55 % ±5 % （M treatment） and 70%±5% （H treatment） were carried out in this article with artificial growth chambers. The results showed that under the high temperature with the average temperature 33 ℃from 10.00 to 16： 00, osmotic adjustment substances and peroxidase activity increased with treated time. Membrane permeability of tomato seedlings decreased with treated time in H treatment; howev er plasma membrane permeability of tomato seedlings increased with time in L and M treatments. During the whole test period,compared with L treatment,tomato seedlings in H treatment had 25%-- 70% less for proline content, and 14%- 32% lower for peroxidase （POD） activity, which indicated that tomato plants in RHT0 % ± 5 % suffered slight heat stress. In conclusion, RHT0 % ± 5 % （H treat- ment） decreased heat injury indices and improved heat resistance of tomato seedlings.
出处
《西北农业学报》
CAS
CSCD
北大核心
2013年第12期119-124,共6页
Acta Agriculturae Boreali-occidentalis Sinica
基金
山西省科技攻关项目(041018-2)
关键词
番茄
高温
空气湿度
脯氨酸含量
POD活性
热害指数
Tomato
High temperature
Air humidity
Proline content
Peroxidase activity
Heat in-jury indices
