Explaining Variation in Fine Root Life Span

2007 ◽  
pp. 382-398 ◽  
Author(s):  
Michael S. Peek
Keyword(s):  
Life Span ◽  
Fine Root ◽  
Root Life Span

scholarly journals Elevated CO2 and O3 Effects on Fine-Root Life Span in Ponderosa Pine

2009 ◽  
Author(s):  
Donald Phillips ◽  
Mark Johnson ◽  
David Tingey ◽  
Marjorie Storm
Keyword(s):  
Life Span ◽  
Elevated Co2 ◽  
Ponderosa Pine ◽  
Fine Root ◽  
Elevated Co2 And O3 ◽  
Root Life Span

Intrinsic and Extrinsic Controls of Fine Root Life Span

2012 ◽  
Vol 32 (3) ◽  
pp. 151-161 ◽  
Author(s):  
Han Y. H. Chen ◽  
Brian W. Brassard
Keyword(s):  
Life Span ◽  
Fine Root ◽  
Root Life Span

scholarly journals (324) Irrigation Effects on Fine Root Dynamics in Peach (Prunus persica)

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1038D-1038
Author(s):  
Christina Wells ◽  
Desmond Layne
Keyword(s):  
Soil Temperature ◽  
Life Span ◽  
Root Length ◽  
Fine Roots ◽  
Fine Root ◽  
Root Dynamics ◽  
Fine Root Dynamics ◽  
Tree Phenology ◽  
Peach Trees ◽  
Root Life Span

We are using a minirhizotron camera system to observe fine root dynamics beneath irrigated and nonirrigated peach trees. Our long term goals are: 1) to relate the timing of fine root production to tree phenology, soil water content, and soil temperature; and 2) to determine how fine root architecture and demography differ between trees with and without supplemental irrigation. In early 2002, minirhizotrons were constructed and installed beneath each of 72 open-center, 4-year-old `Redglobe' peach trees at the Musser Fruit Research Farm near Clemson University. Beginning in May 2002, videotaped images from each minirhizotron were collected at 2-week intervals; notes on tree phenology were also recorded biweekly. Videotapes were digitized in the lab, and information on root length, diameter, appearance and longevity was extracted from the images. Soil temperature and volumetric water content were measured in the orchard throughout the growing season. In the 2 years following minirhizotron installation, irrigated trees allocated a significantly greater percentage of their fine root length to the upper soil layers and exhibited less root branching than nonirrigated trees. Fine roots produced by irrigated trees lived significantly longer: irrigated trees had a median root life span of 165 days, while nonirrigated trees had a median root life span of only 115 days (P< 0.001; proportional hazards regression). Fine roots from irrigated trees remained in the physiologically active “white” state for an average of 10 days longer than roots from nonirrigated trees (P< 0.001). Data from 2002–03 indicate that the trees produce new root flushes at least three times during the year, with a significant flush occurring immediately after harvest.

Effects of elevated CO2, N-fertilization, and season on survival of ponderosa pine fine roots

2000 ◽  
Vol 30 (2) ◽  
pp. 220-228 ◽  
Author(s):  
M G Johnson ◽  
D L Phillips ◽  
D T Tingey ◽  
M J Storm
Keyword(s):  
Life Span ◽  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Fine Roots ◽  
Fine Root ◽  
Ambient Air ◽  
N Fertilization ◽  
Resource Acquisition ◽  
Acquisition Period ◽  
Root Life Span

We used minirhizotrons to assess the effects of elevated CO2, N, and season on the life-span of ponderosa pine (Pinus ponderosa Dougl. ex Laws.) fine roots. CO2 levels were ambient air (A), ambient air + 175 µmol·mol-1 (A + 175) and ambient air + 350 µmol·mol-1 (A + 350). N treatments were 0, 100, and 200 kg N·ha-1 per year (N0, N100, and N200, respectively). Fine root survival was strongly influenced by season and seemed to be most strongly linked to soil temperature. Roots born in the fall and winter had longer median root life-span (MRLs) than those born during the spring and summer. Elevated CO2 increased root life-span, but N fertilization decreased it. Under A, MRL was 74 ± 12 days (mean ± SE) and was significantly different from the MRL for the A + 350 treatment (102 ± 14 days). MRL under A + 175 averaged 92 ± 10 days. MRL was 116 ± 13 days for the N0 treatment and was significantly greater than MRL for the N100 (70 ± 10 days) and N200 (62 ± 14 days) treatments. Assuming that longer lived fine roots continue their resource acquisition functions, then elevated CO2 may have the effect of extending the resource acquisition period. In contrast, fine roots in N-rich environments have shorter life-spans than fine roots in N-poor environments.

scholarly journals The role of fine‐root mass, specific root length and life span in tree performance: A whole‐tree exploration

2020 ◽  
Vol 34 (3) ◽  
pp. 575-585 ◽  
Author(s):  
Monique Weemstra ◽  
Natasa Kiorapostolou ◽  
Jasper Ruijven ◽  
Liesje Mommer ◽  
Jorad Vries ◽  
...  
Keyword(s):  
Life Span ◽  
Root Length ◽  
Fine Root ◽  
Specific Root Length ◽  
Root Mass ◽  
Tree Performance ◽  
Whole Tree

scholarly journals Endogenous and exogenous controls of root life span, mortality and nitrogen flux in a longleaf pine forest: root branch order predominates

2008 ◽  
Vol 96 (4) ◽  
pp. 737-745 ◽  
Author(s):  
Dali Guo ◽  
Robert J. Mitchell ◽  
Jennifer M. Withington ◽  
Ping-Ping Fan ◽  
Joseph J. Hendricks
Keyword(s):  
Life Span ◽  
Longleaf Pine ◽  
Pine Forest ◽  
Nitrogen Flux ◽  
Branch Order ◽  
Root Branch Order ◽  
Root Life Span

Root Life Span, Efficiency, and Turnover

Plant Roots ◽  
2002 ◽  
pp. 221-238 ◽  
Author(s):  
Ruth Yanai ◽  
David Eissenstat
Keyword(s):  
Life Span ◽  
Root Life Span

scholarly journals Spatial and temporal effects of nitrogen addition on root life span ofLeymus chinensisin a typical steppe of Inner Mongolia

2008 ◽  
Vol 22 (4) ◽  
pp. 583-591 ◽  
Author(s):  
W.-M. Bai ◽  
Z.-W. Wang ◽  
Q.-S. Chen ◽  
W.-H. Zhang ◽  
L.-H. Li
Keyword(s):  
Life Span ◽  
Inner Mongolia ◽  
Nitrogen Addition ◽  
Temporal Effects ◽  
Typical Steppe ◽  
Root Life Span
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