scholarly journals The development of an optical scanner method for observation of plant root dynamics

Plant Root ◽  
2008 ◽  
Vol 2 ◽  
pp. 14-18 ◽  
Author(s):  
Masako Dannoura ◽  
Yuji Kominami ◽  
Hiroyuki Oguma ◽  
Yoichi Kanazawa
Keyword(s):  
Plant Root ◽  
Root Dynamics ◽  
Optical Scanner

Flat Optical Scanner Method and Root Dynamics

2011 ◽  
pp. 127-133 ◽  
Author(s):  
Masako Dannoura ◽  
Yuji Kominami ◽  
Naoki Makita ◽  
Hiroyuki Oguma
Keyword(s):  
Root Dynamics ◽  
Optical Scanner

scholarly journals 268 Nursery Irrigation Effects on Postplanting Root Dynamics of Limonium cossonianum O. Kuntze in Semi-arid Conditions

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 488D-488
Author(s):  
J.A. Franco ◽  
M.J. GarcÌa ◽  
V. Cros
Keyword(s):  
Root Growth ◽  
Root Length Density ◽  
Plant Root ◽  
Mediterranean Coast ◽  
Silica Sand ◽  
Root Dynamics ◽  
Deep Soil ◽  
Irrigation Treatments ◽  
Irrigation Effects ◽  
Water Holding

A study was conducted with Limonium cossonianum O. Kuntze to analyze the influence of irrigation regime in nursery on the dynamics of root development after being transplanted with minimum management conditions. Plants were potgrown in a greenhouse. Each plant was potted into 625-mL plastic pot filled with a 1 silica sand medium: 1 peat mixture (v/v) amended with osmocote plus (3.7 g•kg-1 substrate). Drip irrigation was used with a 2-L•h-1 emitter per plant. Two irrigation treatments were used: T3, plants watered 6 days a week at the water-holding capacity (leaching 20% of the applied water) and T1, plants watered twice a week, receiving an amount of water at 30% of T3 plants troughout the nursery period (45 days). After nursery period, plants were transplanted in the open air at the southeast Mediterranean coast of Spain (37°47′N, 0°′54′W), and just one establishment irrigation was applied (50 mm). There were three replications. Plant root and top growth were measured weekly for 13 months. For the root dynamics study, minirhizotrons were used. Acrylic tubes, 2 m long and 80 mm in outside diameter, were placed at a inclination of 24°, reaching a total depth of 160 cm. The evolution of the root length density (RLD) was measured by seven 23-cm-deep soil layers. Results indicate that those plants that were less watered in nursery showed a greater RLD for the whole soil profile. Plants root growth for the top 46 cm of soil were not significantly affected by irrigation treatments; between 46 and 115 cm deep, T1 plants showed greater RLD than T3 (average values of 0.6 vs. 0.3 cm•cm-3); and under 115-cm deep (where root growth was more limited), there were not significant differences. For the first 6 months, a important plant top growth was observed, there being no significant differences among irrigation treatments. Research suported by CICYT grant AGF-96-1136-C02-02.

A preliminary evaluation of the environmental toxicology of road salts on plant root dynamics

BIOS ◽  
2021 ◽  
Vol 92 (2) ◽  
Author(s):  
Keerti Kurapati ◽  
Jackson Stachelek ◽  
Taylor Gauthier ◽  
Hannah Thomas ◽  
Víctor D. Carmona-Galindo
Keyword(s):  
Plant Root ◽  
Environmental Toxicology ◽  
Preliminary Evaluation ◽  
Root Dynamics ◽  
Road Salts

An Equivalent Circuit Model for Vertical Comb Drive MEMS Optical Scanner Controlled by Pulse Width Modulation

2012 ◽  
Vol 132 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Satoshi Maruyama ◽  
Muneki Nakada ◽  
Makoto Mita ◽  
Takuya Takahashi ◽  
Hiroyuki Fujita ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Comb Drive ◽  
Optical Scanner

Effects of defoliation on current-year stem growth and fine root dynamics in Fraxinus mandschurica and Larix gmelinii seedlings

2014 ◽  
Vol 38 (10) ◽  
pp. 1082-1092 ◽  
Author(s):  
LI Jun-Nan ◽  
◽  
WANG Wen-Na ◽  
XIE Ling-Zhi ◽  
WANG Zheng-Quan ◽  
...  
Keyword(s):  
Fine Root ◽  
Stem Growth ◽  
Larix Gmelinii ◽  
Root Dynamics ◽  
Fine Root Dynamics

Influence of Pruning and Irrigation on Root Longevity of `Concord' Vines

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 511a-511
Author(s):  
L.H. Comas ◽  
D.M. Eissenstat ◽  
A.N. Lakso ◽  
R. Dunst
Keyword(s):  
Fine Roots ◽  
Fine Root ◽  
Cultural Practices ◽  
Growing Season ◽  
Root Production ◽  
Root Dynamics ◽  
Supplemental Irrigation ◽  
Root Longevity ◽  
Root Lifespan ◽  
Median Lifespan

Improved cultural practices in grape require a better understanding of root growth and physiology. Seasonal root dynamics were examined in mature `Concord' vines with balanced or minimal-pruning, and with or without supplemental irrigation in Fredonia, N.Y. Fine roots were continuously produced during the growing season starting in mid-June around time of bloom. Roots began to die in September at verasion. Minimal-pruned vines produced more roots than balanced-pruned vines, with the minimal-pruned/unirrigated vines producing the most roots. Irrigation and pruning delayed fine root production at the beginning of the growing season. Peak fine root flush was 16 June to 21 July 1997 for the minimal-pruned/unirrigated treatment, while peak flush was 7 July to 2 Sept. 1997 for balanced-pruned/irrigated treatment. In minimal-pruned vines, many roots were observed down to depths of 120 cm. In contrast, balanced-pruned vines had very few fine roots deeper than 40 cm. From initial observations, median lifespan of fine roots was 5 to 9.5 weeks, depending on treatment and depth in soil. Fine roots lived longer in the top 15-cm than in the 16- to 30-cm layer of soil in all treatments. Both minimal pruning and irrigation increased root lifespan. Fine roots had the shortest lifespan in the balanced-pruned/unirrigated treatment and the longest lifespan in the minimal-pruned/irrigated treatment.

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