不同植物生长调节剂对穿心莲形态性状及干物质积累的影响

Effects of Different Plant Growth Regulators on Morphological Characters and Dry Matter Accumulation of Andrographis paniculata

以广西地方品种穿心莲为试材,采用温室盆栽法,选用萘乙酸(NAA)、6-苄基腺嘌呤(6-BA)、赤霉素(GA_(3))、2,4-表油菜素内酯(eBR)和矮壮素(CCC)5种生产上常用的植物生长调节剂,研究了不同类型、不同浓度的植物生长调节剂对穿心莲形态性状及干物质积累的影响,以期为提高穿心莲中药材产量提供参考依据。结果表明:200、400 mg·L^(-1)及600 mg·L^(-1) GA_(3)处理均可使穿心莲株高显著增加(P<0.05),叶片明显变大,其中以喷施400 mg·L^(-1) GA_(3)株高增加极显著(P<0.01),且喷施400 mg·L^(-1) GA_(3)单株生物量显著增加20.97%(P<0.05),但在增加单株生物量的同时叶茎比却减小了。CCC各处理穿心莲单株生物量虽有不同程度的减小,但50 mg·L^(-1) CCC可显著增加叶茎比(P<0.05)。6-BA和NAA各处理浓度对穿心莲叶干质量、叶茎比及单株生物量均有不同程度的抑制作用。综上所述,喷施400 mg·L^(-1) GA_(3)可使单株生物量显著增加,而6-BA和NAA不宜在穿心莲生产上使用。

The Guangxi local variety Andrographis paniculata was used as test material,and the greenhouse potting method was adopted,five commonly used plant growth regulators in production were selected to research the effects of different plant growth regulators on morphological characters and dry matter accumulation of Androgrcaphis paniculata,including NAA,6-BA,eBR,CCC and GA_(3),in order to provide reference for increasing the yield of Chinese medicinal materials.The results showed that the treatments of 200 mg·L^(-1),400 mg·L^(-1) and 600 mg·L^(-1) GA_(3) could significantly increase the plant height of Andrographis paniculata(P<0.05),and the leaves were obviously enlarged.Among them,spraying 400 mg·L^(-1) GA_(3) increased the plant height extremely significantly(P<0.01),and spraying 400 mg·L^(-1) GA_(3),the biomass of single plant significantly increased by20.97%(P<0.05),but the leaf-to-stem ratio decreased while increasing the biomass per plant.Although the biomass of single plant of Andrographis paniculatain each CCC treatments decreased in different degrees,50 mg·L^(-1) CCC could significantly increase the leaf-to-stem ratio(P<0.05).Each treatment concentration of 6-BA and NAA inhibited dry matter accumulation on Andrographis paniculata.In summary,spraying 400 mg·L^(-1) GA_(3) can significantly increase the biomass of single plant,but 6-BA and NAA are not suitable for the production of Andrographispaniculata.