Relationships among root branch order, carbon, and nitrogen in four temperate species

Oecologia ◽  
1997 ◽  
Vol 111 (3) ◽  
pp. 302-308 ◽  
Author(s):  
Kurt S. Pregitzer ◽  
Mark E. Kubiske ◽  
Chui Kwan Yu ◽  
Ronald L. Hendrick
Keyword(s):  
Temperate Species ◽  
Branch Order ◽  
Carbon And Nitrogen ◽  
Root Branch Order

scholarly journals Differential variation of NSCs in root branch orders of Fraxinus mandshurica Rupr. seedlings across different drought intensities and soil substrates

2021 ◽  
Author(s):  
Li Ji ◽  
Yue Liu ◽  
Jun Wang ◽  
Zhimin Lu ◽  
Yuchun Yang ◽  
...  
Keyword(s):  
Fine Roots ◽  
Fine Root ◽  
Sandy Loam ◽  
Starch Content ◽  
Soluble Sugar ◽  
Root Traits ◽  
Drought Intensity ◽  
Branch Order ◽  
Root Branch Order ◽  
Loam Soil

Non-structural carbohydrates (NSCs) facilitate plants adapt to drought stress, could characterize trees growth and survival ability and buffer against external disturbances. Previous studies have focused on the distribution and dynamics of NSCs among different plant organs under drought conditions. However, discussion about the NSC levels of fine roots in different root branch order were little, especially the relationship between fine root trait variation and NSCs content. The aim of the study is to shed light into the synergistic variation of fine root traits and NSC content in different root branch order under different drought and soil substrate conditions. 2-year-old Fraxinus mandshurica Rupr. potted seedlings were planted in three different soil substrates (humus, loam and sandy-loam soil) and conducted to four drought intensities (CK, mild drought, moderate drought and severe drought) for two months. With the increase of drought intensity, the biomass of fine roots decreased significantly. Under the same drought intensity, seedlings in sandy-loam soil have higher root biomass, and the coefficient of variation of fifth-order roots (37.4%, 44.5% and 53.0% in humus, loam and sandy loam, respectively) is higher than that of lower-order roots. With the increase of drought intensity, the specific root length (SRL) and average diameter (AD) of all five orders increased and decreased, respectively. The fine roots in humus soil had higher soluble sugar content and lower starch content. Also, the soluble sugar and starch content of fine roots showed decreasing and increasing tendency respectively. Soluble sugar and starch explain the highest degree of total variation of fine root traits, that is 32.0% and 32.1% respectively. With ascending root order, the explanation of the variation of root traits by starch decreased (only 6.8% for fifth-order roots). The response of different root branch order fine root morphological traits of F. mandshurica seedlings to resource fluctuations ensures that plants maintain and constructure the root development by an economical way to obtain more resources.

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

Linking root morphology, longevity and function to root branch order: a case study in three shrubs

2010 ◽  
Vol 336 (1-2) ◽  
pp. 197-208 ◽  
Author(s):  
Gang Huang ◽  
Xue-yong Zhao ◽  
Ha-lin Zhao ◽  
Ying-xin Huang ◽  
Xiao-an Zuo
Keyword(s):  
Root Morphology ◽  
Branch Order ◽  
Root Branch Order ◽  
And Function

scholarly journals The interactive impact of root branch order and soil genetic horizon on root respiration and nitrogen concentration

2017 ◽  
Vol 37 (8) ◽  
pp. 1055-1068 ◽  
Author(s):  
Lidia K. Trocha ◽  
Bartosz Bułaj ◽  
Paulina Kutczyńska ◽  
Joanna Mucha ◽  
Paweł Rutkowski ◽  
...  
Keyword(s):  
Root Respiration ◽  
Nitrogen Concentration ◽  
Genetic Horizon ◽  
Branch Order ◽  
Root Branch Order

scholarly journals Variation of the Linkage of Root Function with Root Branch Order

PLoS ONE ◽  
2013 ◽  
Vol 8 (2) ◽  
pp. e57153 ◽  
Author(s):  
Yingqian Long ◽  
Deliang Kong ◽  
Zhengxia Chen ◽  
Hui Zeng
Keyword(s):  
Root Function ◽  
Branch Order ◽  
Root Branch Order

Metabolic signalling and the partitioning of resources in plant storage organs

1999 ◽  
Vol 133 (3) ◽  
pp. 243-249 ◽  
Author(s):  
NIGEL G. HALFORD
Keyword(s):  
Dry Weight ◽  
Wild Relatives ◽  
Crop Plants ◽  
Wild Plants ◽  
Young Plant ◽  
Carbon And Nitrogen ◽  
Cultivated Potato ◽  
Metabolic Signalling ◽  
Storage Organs ◽  
Plant Storage

The most important harvested organs of crop plants, such as seeds, tubers and fruits, are often described as assimilate sinks. They play little or no part in the fixation of carbon through the production of sugars through photosynthesis, or in the uptake of nitrogen and sulphur, but import these assimilated resources to support metabolism and to store them in the form of starch, oils and proteins. Wild plants store resources in seeds and tubers to later support an emergent young plant. Cultivated crops are effectively storing resources to provide us with food and many have been bred to accumulate much more than would be required otherwise. For example, approximately 80% of a cultivated potato plant's dry weight is contained in its tubers, ten times the proportion in the tubers of its wild relatives (Inoue & Tanaka 1978). Cultivation and breeding has brought about a shift in the partitioning of carbon and nitrogen assimilate between the organs of the plant.

Precipitation in silicon: Microanalysis

1988 ◽  
Vol 46 ◽  
pp. 474-475
Author(s):  
R.W. Carpenter
Keyword(s):  
Transition Metals ◽  
Spatial Resolution ◽  
Thin Foil ◽  
Precipitation Reaction ◽  
High Current ◽  
Reaction Products ◽  
Carbon And Nitrogen ◽  
Dielectric Layers ◽  
Precipitation Processes ◽  
Areas Of Interest

Interest in precipitation processes in silicon appears to be centered on transition metals (for intrinsic and extrinsic gettering), and oxygen and carbon in thermally aged materials, and on oxygen, carbon, and nitrogen in ion implanted materials to form buried dielectric layers. A steadily increasing number of applications of microanalysis to these problems are appearing. but still far less than the number of imaging/diffraction investigations. Microanalysis applications appear to be paced by instrumentation development. The precipitation reaction products are small and the presence of carbon is often an important consideration. Small high current probes are important and cryogenic specimen holders are required for consistent suppression of contamination buildup on specimen areas of interest. Focussed probes useful for microanalysis should be in the range of 0.1 to 1nA, and estimates of spatial resolution to be expected for thin foil specimens can be made from the curves shown in Fig. 1.

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