5个一串红品种耐热性鉴定

Heat Tolerance Identification of Five Varieties of Salvia Splendens

一串红是夏季园林常见花卉,2008年北京奥运会召开期间正值北京地区夏季高温天气,为使一串红发挥出很好的景观效应,选用耐热性好的品种是关键措施之一。通过对自育的1120#、12#、73#品种和国外引进的展望、王后共5个一串红品种在热胁迫处理下叶绿素含量、电导率、MDA和脯胺酸含量测定,结果表明,随着热处理时间延长,展望和王后叶片叶绿素下降速度最大、细胞膜伤害率上升最快、MDA含量达最大、脯氨酸含量增幅较小,是最不耐热的2个品种,1120#、12#和73#品种耐热性较好。这种耐热性差异在北京地区夏季盆花生产中也得到证实。因此,在夏季高温季节种植一串红,建议选用耐热性较好的1120#、12#和73#品种。

Salvia splendens is used widely in landscape. It will be hot summer in Beijing when the Olympic Game opens in August 2008. Using heat tolerant varieties is one of the effective measures. The chlorophyll content, conductivity, malondialdehyde and proline content of 5 varieties of Salvia splendens such as 1120#, 12#, 73# and two introduced varieties Vista and Scarlet Queen under the heat stress were investigated. The results showed that as the heat treatment prolonged, the varieties Vista and Scarlet Queen＇s chlorophyll content drop fastest, cell membrane injury rate went up fastest, MDA content was the highest, proline content increase was the smallest. Therefore they were both not heat tolerant varieties, while varieties 1120#, 12# and 73# we bred have better heat tolerance than the introduced varieties. And the difference between our varieties and introduced varieties was proved in the potted flower production in the summer of Beijing. So varieties 1120#, 12# and 73# were suggested when grow Salvia splendens in hot summer.