题目What isapical dominance? Why do plants have apical dominance? (6marks)相关知识点: 试题来源: 解析 植物主茎顶芽生长快,侧芽生长慢甚至不明发的现象称为顶端优势。产生顶端优势的原因至今不清楚,主要在下列假设。 (1)营养假说, 认为顶芽是一个“营养库”,它优先利用营养物质,使侧芽由于营养缺乏而受到抑制...
for asexual propagation, naa is used to initiate root formation in the stem cuttings apical dominance: when the growth of apical meristem inhibits the growth of axillary buds, the phenomenon is known as apical dominance. when the shoot tip is removed, it induces the growth of lateral buds. ...
1. 1. Reviewing the literature on apical dominance in the light of the "PESIGS" rules formulated in the preceding paper (Jacobs, 1959) made clear that earlier researchers had never demonstrated exact substitution of synthetic auxin for the native auxin of the apex. 2. 2. Our clone of ...
the transmembrane protein PIN1 is strongly expressed in epidermal cells of the SAM and its apical polarization results in the creation of an auxin gradient with maxima directed towards sites of incipient leaf primordia [23–25,72–75] (Figure2A). This in turn acts as an auxin sink that is ...
As described in the text, the drug class, timing, dose, and pattern of intake all substantially determine the long-term effects on the developing child. PowerPoint slide Full size image Surprisingly, research in this area is still in its formative stages, and more precise and mechanistic work...
The adaxial/abaxial axis is also established at leaf initiation, and represents an important axis that require proper establishment for proper lamina outgrowth. In Arabidopsis,PHABULOSA(PHB),PHAVOLUTA(PHV), andREVOLUTA(REV), members of the class IIIHOMEODOMAIN-LEUCINE ZIPPER(HD-ZIPIII) gene family...
Hormone transporters are crucial for plant hormone action, which is underlined by severe developmental and physiological impacts caused by their loss-of-function mutations. Here, we summarize recent knowledge on the individual roles of plant hormone tran
Well-known bacterial endotoxin (i.e., lipopolysaccharide: LPS) is a component of the bacterial wall of gram-negative bacteria and acts as one of the pathogen-associated molecular patterns (PAMPs) for Toll-like receptor (TLR) 4. Translocated microbial products activate KCs in the liver through ...