PDF(Pubmed)
Abstract：
This study extensively characterizes the morphological characteristics, including the leaf morphology, plant structure, flower development, and trichome features throughout the entire life cycle of Cannabis sativa L. cv. White Widow. The developmental responses to photoperiodic variations were investigated from germination to mature plant senescence. The leaf morphology showed a progression of complexity, beginning with serrations in the 1st true leaves, until the emergence of nine leaflets in the 6th true leaves, followed by a distinct shift to eight, then seven leaflets with the 14th and 15th true leaves, respectively. Thereafter, the leaf complexity decreased, culminating in the emergence of a single leaflet from the 25th node. The leaf area peaked with the 12th leaves, which coincided with a change from opposite to alternate phyllotaxy. The stipule development at nodes 5 and 6 signified the vegetative phase, followed by bract and solitary flower development emerging in nodes 7-12, signifying the reproductive phase. The subsequent induction of short-day photoperiod triggered the formation of apical inflorescence. Mature flowers displayed abundant glandular trichomes on perigonal bracts, with stigma color changing from whitish-yellow to reddish-brown. A pronounced increase in trichome density was evident, particularly on the abaxial bract surface, following the onset of flowering. The trichomes exhibited simultaneous growth in stalk length and glandular head diameter and pronounced shifts in color. Hermaphroditism occurred well after the general harvest date. This comprehensive study documents the intricate photoperiod-driven morphological changes throughout the complete lifecycle of Cannabis sativa L. cv. White Widow. The developmental responses characterized provide valuable insights for industrial and research applications.
摘要：
这项研究广泛地描述了形态特征，包括叶子的形态,植物结构,花的发育，和毛状体特征贯穿大麻的整个生命周期。白寡妇研究了从发芽到成熟植物衰老对光周期变化的发育反应。叶片形态表现出复杂性的进展，从第一片真叶的锯齿开始，直到第6片真叶出现9片小叶,接着是一个明显的转变到八个，然后是七张带有第14和第15个真叶的传单，分别。此后,叶子的复杂性降低了，最终从第25个节点出现单个小叶。叶面积以第12片叶子达到顶峰，这与从相反叶序到交替叶序的变化相吻合。节点5和6的托叶发育表示营养期，其次是7-12节出现的苞片和单生花发育，表示生殖阶段。随后的短日光周期诱导触发了顶花序的形成。成熟的花朵在周围苞片上显示出丰富的腺毛，柱头颜色从发白黄色变为红棕色。毛状体密度明显增加，特别是在背面，开花开始后。毛状体的茎长和腺头直径同时增长，颜色明显变化。雌雄同体在一般收获日期之后发生。这项全面的研究记录了大麻在整个生命周期中复杂的光周期驱动的形态变化。白寡妇表征的发展反应为工业和研究应用提供了有价值的见解。
