scholarly journals Effect of Water Management of Paddy Fields on the Direction of Crown Root Growth and the Lateral Root Formation of Rice Plants

1977 ◽  
Vol 46 (4) ◽  
pp. 543-557 ◽  
Author(s):  
Shin-ichiro KAWATA ◽  
Manabu KATANO
Keyword(s):  
Water Management ◽  
Root Growth ◽  
Lateral Root ◽  
Root Formation ◽  
Paddy Fields ◽  
Lateral Root Formation ◽  
Rice Plants ◽  
Crown Root ◽  
Effect Of Water

scholarly journals Lateral Root Priming Synergystically Arises from Root Growth and Auxin Transport Dynamics

2018 ◽  
Author(s):  
Thea van den Berg ◽  
Kirsten H. ten Tusscher
Keyword(s):  
Cell Cycle ◽  
Root Growth ◽  
Lateral Root ◽  
Root Formation ◽  
Growth Dynamics ◽  
Root Tip ◽  
Cycle Duration ◽  
Elongation Zone ◽  
Lateral Root Formation ◽  
Cell Cycle Duration

AbstractThe root system is a major determinant of plant fitness. Its capacity to supply the plant with sufficient water and nutrients strongly depends on root system architecture, which arises from the repeated branching off of lateral roots. A critical first step in lateral root formation is priming, which prepatterns sites competent of forming a lateral root. Priming is characterized by temporal oscillations in auxin, auxin signalling and gene expression in the root meristem, which through growth become transformed into a spatially repetitive pattern of competent sites. Previous studies have demonstrated the importance of auxin synthesis, transport and perception for the amplitude of these oscillations and their chances of producing an actual competent site. Additionally, repeated lateral root cap apoptosis was demonstrated to be strongly correlated with repetitive lateral root priming. Intriguingly, no single mutation has been identified that fully abolishes lateral root formation, and thusfar the mechanism underlying oscillations has remained unknown. In this study, we investigated the impact of auxin reflux loop properties combined with root growth dynamics on priming, using a computational approach. To this end we developed a novel multi-scale root model incorporating a realistic root tip architecture and reflux loop properties as well as root growth dynamics. Excitingly, in this model, repetitive auxin elevations automatically emerge. First, we show that root tip architecture and reflux loop properties result in an auxin loading zone at the start of the elongation zone, with preferential auxin loading in narrow vasculature cells. Second, we demonstrate how meristematic root growth dynamics causes regular alternations in the sizes of cells arriving at the elongation zone, which subsequently become amplified during cell expansion. These cell size differences translate into differences in cellular auxin loading potential. Combined, these properties result in temporal and spatial fluctuations in auxin levels in vasculature and pericycle cells. Our model predicts that temporal priming frequency predominantly depends on cell cycle duration, while cell cycle duration together with meristem size control lateral root spacing.

scholarly journals On the Lateral Root Formation in Relation to the Diameter of Crown Roots in Rice Plants

1980 ◽  
Vol 49 (1) ◽  
pp. 103-111 ◽  
Author(s):  
Shin-ichiro KAWATA ◽  
Osamu SASAKI ◽  
koou YAMAZAKI
Keyword(s):  
Lateral Root ◽  
Root Formation ◽  
Lateral Root Formation ◽  
Rice Plants ◽  
Crown Roots

EFFECT OF METAL NANOPARTICLES ON THE GROWTH OF NGOC LINH GINSENG (PANAX VIETNAMENSIS) LATERAL ROOTS CULTURED IN VITRO

2017 ◽  
Vol 126 (1C) ◽  
Author(s):  
Duong Tan Nhut ◽  
Nguyen Thi Nhat Linh ◽  
Nguyen Hoang Loc ◽  
Hoang Thanh Tung ◽  
Vu Thi Hien ◽  
...  
Keyword(s):  
Root Growth ◽  
Metal Nanoparticles ◽  
Lateral Root ◽  
Root Formation ◽  
Lateral Roots ◽  
Metal Nanoparticle ◽  
Ginseng Root ◽  
Lateral Root Formation ◽  
Triterpenoid Saponins

<p><em>Panax vietnamensis</em> (Ngoc Linh ginseng) plays critical roles in pharmaceutical industry because triterpenoid saponins from its roots produce medicine for improving health and treating many diseases. Metal nanoparticles reveal completely new or improved properties based on specific characteristics such as size, distribution and morphology compare to metal ion or salt; and their potential for <em>in vitro </em>plant cultures. Present study investigated the effects of metal nanoparticles including nZnO (0.5-2.5 mg/l), nAg (1-3 mg/l), and nCu (1-3 mg/l) supplemented in free-hormone-MS medium to <em>in vitro Panax vietnamensis </em>lateral root growth. Our results showed that metal nanoparticles have the positive effect on the growth of<em> in vitro P. vietnamensis </em>lateral<em> </em>roots with nAg, nCu, and nZnO. At different concentrations, <em>in vitro P. vietnamensis </em>lateral root growth also has various effects on the growth of lateral roots. In supplemented metal nanoparticle treatments, nCu is the most optimum for <em>in vitro P. vietnamensis</em> lateral root growth; the highest increase was obtained at 1.5 mg/l nCu treatment (99.3% lateral root formation and all root growth indexes are the highest). Besides, 2.5 mg/l nAg is also significantly noticed in ginseng root growth. However, the negative impact on the growth of the <em>in vitro P. vietnamensis</em> lateral roots showed when culture medium contained the highest concentration; such as the root growing inhibition of nCu and nAg above 2.5 mg/l. Especially, this decrease was higher with the application of nZnO0.5-2.5 mg/l (decrease the lateral root number) and 2.5 mg/l (decrease percent of lateral root formation).</p>

scholarly journals EFFECT OF METAL NANOPARTICLES ON THE GROWTH OF NGOC LINH GINSENG (PANAX VIETNAMENSIS) LATERAL ROOTS CULTURED IN VITRO

2017 ◽  
Vol 126 (1C) ◽  
pp. 47
Author(s):  
Nguyễn Thị Nhật Linh ◽  
Hoàng Thanh Tùng ◽  
Vũ Thị Hiền ◽  
Vũ Quốc Luận ◽  
Nguyễn Phúc Huy ◽  
...  
Keyword(s):  
Root Growth ◽  
Metal Nanoparticles ◽  
Lateral Root ◽  
Root Formation ◽  
Lateral Roots ◽  
Metal Nanoparticle ◽  
Ginseng Root ◽  
Lateral Root Formation ◽  
Triterpenoid Saponins

<p><em>Panax vietnamensis</em> (Ngoc Linh ginseng) plays critical roles in pharmaceutical industry because triterpenoid saponins from its roots produce medicine for improving health and treating many diseases. Metal nanoparticles reveal completely new or improved properties based on specific characteristics such as size, distribution and morphology compare to metal ion or salt; and their potential for <em>in vitro </em>plant cultures. Present study investigated the effects of metal nanoparticles including nZnO (0.5-2.5 mg/l), nAg (1-3 mg/l), and nCu (1-3 mg/l) supplemented in free-hormone-MS medium to <em>in vitro Panax vietnamensis </em>lateral root growth. Our results showed that metal nanoparticles have the positive effect on the growth of<em> in vitro P. vietnamensis </em>lateral<em> </em>roots with nAg, nCu, and nZnO. At different concentrations, <em>in vitro P. vietnamensis </em>lateral root growth also has various effects on the growth of lateral roots. In supplemented metal nanoparticle treatments, nCu is the most optimum for <em>in vitro P. vietnamensis</em> lateral root growth; the highest increase was obtained at 1.5 mg/l nCu treatment (99.3% lateral root formation and all root growth indexes are the highest). Besides, 2.5 mg/l nAg is also significantly noticed in ginseng root growth. However, the negative impact on the growth of the <em>in vitro P. vietnamensis</em> lateral roots showed when culture medium contained the highest concentration; such as the root growing inhibition of nCu and nAg above 2.5 mg/l. Especially, this decrease was higher with the application of nZnO0.5-2.5 mg/l (decrease the lateral root number) and 2.5 mg/l (decrease percent of lateral root formation).</p>

scholarly journals Mepiquat chloride promotes cotton lateral root formation by modulating plant hormone homeostasis

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Qian Wu ◽  
Mingwei Du ◽  
Jie Wu ◽  
Ning Wang ◽  
Baomin Wang ◽  
...  
Keyword(s):  
Root Growth ◽  
Root Development ◽  
Lateral Root ◽  
Seed Treatment ◽  
Molecular Mechanisms ◽  
Root Formation ◽  
Lateral Root Formation ◽  
Mepiquat Chloride ◽  
Auxin Level ◽  
Lateral Root Development

Abstract Background Mepiquat chloride (MC), a plant growth regulator, enhances root growth by promoting lateral root formation in cotton. However, the underlying molecular mechanisms of this phenomenon is still unknown. Methods In this study, we used 10 cotton (Gossypium hirsutum Linn.) cultivars to perform a seed treatment with MC to investigate lateral root formation, and selected a MC sensitive cotton cultivar for dynamic monitor of root growth and transcriptome analysis during lateral root development upon MC seed treatment. Results The results showed that MC treated seeds promotes the lateral root formation in a dosage-depended manner and the effective promotion region is within 5 cm from the base of primary root. MC treated seeds induce endogenous auxin level by altering gene expression of both gibberellin (GA) biosynthesis and signaling and abscisic acid (ABA) signaling. Meanwhile, MC treated seeds differentially express genes involved in indole acetic acid (IAA) synthesis and transport. Furthermore, MC-induced IAA regulates the expression of genes related to cell cycle and division for lateral root development. Conclusions Our data suggest that MC orchestrates GA and ABA metabolism and signaling, which further regulates auxin biosynthesis, transport, and signaling to promote the cell division responsible for lateral root formation.

Glutamine accumulation inhibits root growth and lateral root formation in ginseng hairy roots

Plant Science ◽  
2006 ◽  
Vol 170 (4) ◽  
pp. 801-807 ◽  
Author(s):  
Sung-Min Jung ◽  
Suk Weon Kim ◽  
Sung Hee Ban ◽  
Dong Su In ◽  
Jong Duck Jung ◽  
...  
Keyword(s):  
Root Growth ◽  
Hairy Roots ◽  
Lateral Root ◽  
Root Formation ◽  
Lateral Root Formation

Lateral root formation and nutrients: nitrogen in the spotlight

2021 ◽  
Author(s):  
Pierre-Mathieu Pélissier ◽  
Hans Motte ◽  
Tom Beeckman
Keyword(s):  
Signaling Pathways ◽  
Root System ◽  
Root Development ◽  
Lateral Root ◽  
Molecular Mechanisms ◽  
Root Formation ◽  
Lateral Roots ◽  
Nutrient Use Efficiency ◽  
Lateral Root Formation ◽  
Lateral Root Development

Abstract Lateral roots are important to forage for nutrients due to their ability to increase the uptake area of a root system. Hence, it comes as no surprise that lateral root formation is affected by nutrients or nutrient starvation, and as such contributes to the root system plasticity. Understanding the molecular mechanisms regulating root adaptation dynamics towards nutrient availability is useful to optimize plant nutrient use efficiency. There is at present a profound, though still evolving, knowledge on lateral root pathways. Here, we aimed to review the intersection with nutrient signaling pathways to give an update on the regulation of lateral root development by nutrients, with a particular focus on nitrogen. Remarkably, it is for most nutrients not clear how lateral root formation is controlled. Only for nitrogen, one of the most dominant nutrients in the control of lateral root formation, the crosstalk with multiple key signals determining lateral root development is clearly shown. In this update, we first present a general overview of the current knowledge of how nutrients affect lateral root formation, followed by a deeper discussion on how nitrogen signaling pathways act on different lateral root-mediating mechanisms for which multiple recent studies yield insights.

Sign in / Sign up

Export Citation Format

Share Document