Burgel Lisa, Hartung Jens, Schibano Daniele, Graeff-Hönninger Simone
Department of Agronomy, Institute of Crop Science, Cropping Systems and Modelling, University of Hohenheim, 70599 Stuttgart, Germany.
Department of Agronomy, Institute of Crop Science, Biostatistics, University of Hohenheim, 70599 Stuttgart, Germany.
Plants (Basel). 2020 Jun 8;9(6):725. doi: 10.3390/plants9060725.
The impact of exogenously applied plant growth regulators (PGR), 1-naphthalenaecetic acid (NAA), 6-benzylaminopurine (BAP), and a mixture of both (NAA/BAP-mix), was investigated in regard to plant height, length of axillary branches, number of internodes, biomass yield and cannabinoid content of three different phytocannabinoid-rich (PCR) genotypes. The results showed that total plant height was significantly reduced under the application of NAA (28%), BAP (18%), and NAA/BAP-mix treated plants (15%). Axillary branch length was also significantly reduced by 58% (NAA) and 30% (NAA/BAP-mix). BAP did not significantly reduce the length of axillary branches. The number of internodes was reduced by NAA (19%), BAP (10%), and the NAA/BAP-mix (14%) compared to the untreated control. NAA application influenced the plant architecture of the tested cv. KANADA beneficially, resulting in a more compact growth habitus, while inflorescence yield (23.51 g plant) remained similar compared to the control (24.31 g plant). Inflorescence yield of v. 0.2x and cv. FED was reduced due to PGR application while cannabinoid content remained stable. Overall, the application of PGR could be used on a genotype-specific level to beneficially influence plant architecture and optimize inflorescence yield per unit area and thus cannabinoid yield, especially in the presence of space limitations under indoor cultivation.
研究了外源施加植物生长调节剂（PGR）、1-萘乙酸（NAA）、6-苄基腺嘌呤（BAP）以及二者混合物（NAA/BAP混合液）对三种不同富含植物大麻素（PCR）基因型植株的株高、腋枝长度、节间数、生物量产量和大麻素含量的影响。结果表明，在施加NAA（降低28%）、BAP（降低18%）和NAA/BAP混合液处理的植株（降低15%）后，植株总高度显著降低。腋枝长度也因NAA（降低58%）和NAA/BAP混合液（降低30%）而显著降低。BAP并未显著降低腋枝长度。与未处理的对照相比，NAA使节间数减少了19%，BAP减少了10%，NAA/BAP混合液减少了14%。施用NAA对测试品种KANADA的植株结构有有益影响，使其生长习性更紧凑，而花序产量（每株23.51 g）与对照（每株24.31 g）相比保持相似。由于施用PGR，v. 0.2x和品种FED的花序产量降低，而大麻素含量保持稳定。总体而言，PGR的施用可在基因型特异性水平上用于有益地影响植株结构，并优化单位面积的花序产量，从而优化大麻素产量，特别是在室内种植存在空间限制的情况下。
