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作 者:李华云[1] 庄军平[1] 黄胜琴[1] 叶庆生[1]
机构地区:[1]华南师范大学生命科学学院广东省植物发育生物工程重点实验室,广州510631
出 处:《园艺学报》2007年第3期705-710,共6页Acta Horticulturae Sinica
基 金:广东省自然科学基金重点项目(04105806);广东省科技攻关项目(2006B20301006);广东省科技计划项目(2006420101007)
摘 要:研究了CO2(700±50)μmol·mol-1、(1000±50)μmol·mol-1、(360±30)μmol·mol-1(对照)对蝴蝶兰CO2吸收速率和生长的影响。研究结果表明:蝴蝶兰叶片净CO2吸收速率在02:00达到最大,可滴定酸积累在04:00达到最高;CO2加富显著提高蝴蝶兰夜间的CO2吸收速率,在处理30d时,所测得的CO2吸收速率的增幅分别为同期对照的134·11%和435·3%,可滴定酸积累的分别比对照增加65·05%和119·42%,随着处理时间的延长,CO2吸收速率增幅逐渐下降;CO2加富促进了叶片碳水化合物(可溶性糖和淀粉)的积累,在CO2(1000±50)μmol·mol-1处理组中碳水化合物积累的促进尤为明显;总生物量的测定表明,处理60d,鲜样质量比同期对照增加了23%和49%,干样质量增加了38%和57%,处理150d时,鲜样质量比对照增加了50%和94%,干样质量增加了19%和64%。以上结果表明CO2加富能显著促进蝴蝶兰的生长。Effects of elevated CO2 concentration on growth and CO2 fixation of Phalaenopsis were studied under elevated CO2 [ (700 ± 50) μmol·mol^-1, ( 1 000 ± 50) μmol·mol^-1 ] and ambient CO2 concentrations [ (360 ± 30) μmol·mol^-1, control ] at 30 d ( short-term experiment) and 150 d ( long-term experiment) after exposure to the corresponding CO2 concentrations. The results showed that the net CO2 absorption rate reached a maximum at 2: 00 A. M. , with 134. 11% in (700 ±50) μmol·mol^-1 and 435.3% in ( 1 000 ± 50) μmol·mol^-1 higher than control at 30 d, while the increase rate decreased with time. Elevated CO2 resulted in the increase of the accumulation of titratable acids (TA) which increased by 65.05% in (700 ±50)μmol·mol^-1 and 119. 42% in (1 000 ±50)μmol·mol^-1 at 30 d compared to control, but decreased slightly thereafter. Elevated CO2 treatment also resulted in the accumulation of carbohydrates ( soluble sugar and starch) in leaves, and the accumulation rate in ( 1 000 ±50)μmol·mol^-1 was higher than in (700 ± 50) μmol·mol^-1. Compared with control, the fresh mass in (700 ± 50) μmol·mol^-1 and ( 1 000 ± 50) μmol·mol^-1 increased by 23% and 49% at 60 d, and 50% and 94% at 150 d, respectively; the dry mass in (700 ±50)μmol·mol^-1 and (1 000 ±50) μmol·mol^-1 was increased by 38% and 57% at 60 d, and 19% and 64% at 150 d, respectively. These results demonstrated that elevated CO2 has significant effects on the growth of Phalaenopsis.
关 键 词:蝴蝶兰 PHALAENOPSIS 高浓度CO2 CO2吸收速率 生长
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