נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Plant size is related to biomass partitioning and stress resistance in water-limited annual plant communities
Year:
2019
Source of publication :
Journal of Arid Environments
Authors :
אוסם, יגיל
;
.
גולודץ, קרלי
;
.
דוברת, גיא
;
.
Volume :
165
Co-Authors:

Meron, E., Department of Solar Energy and Environmental Physics, Blaustein Institutes for Desert Research, Ben-Gurion University, Sede Boqer Campus84990, Israel, Physics Department, Ben-Gurion University, Beer Sheva, 84105, Israel; Shachak, M., Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University, Sede Boqer Campus84990, Israel;

 

Facilitators :
From page:
1
To page:
9
(
Total pages:
9
)
Abstract:

Plant functional traits are used increasingly for linking environmental conditions, community structure and ecosystem function. Traits associated with rapid resource capture may come at the expense of those related to stress resistance. In annual plants, such a tradeoff may be reflected through plant size (biomass) vs. biomass partitioning patterns, as the former represents resource capture rate while the latter represents reorganization to cope with resource stress. In a water-limited annual plant community we investigated: 1) the effects of water and nitrogen availability on plant size and biomass partitioning, i.e., biomass partitioning between organs (root to shoot ratio, R/S, and reproductive effort, Rep/Veg), and biomass partitioning in space (specific leaf area, SLA), 2) the relationship between plant size and biomass partitioning at both the interspecific and intraspecific level, and 3) the relationships between plant size and biomass partitioning strategy and stress resistance. Eight key species varying in their natural size range were grown under variable water and nitrogen availability and their size and biomass partitioning were monitored throughout their growth and at fixed phenological phases. In all species, reduced water and/or nitrogen availability was associated with smaller size, increased R/S, and decreased SLA while Rep/Veg remained constant. At the intraspecific level, plant size was negatively related to R/S and positively related to SLA. At the interspecific level, no relationship was found between size or stress resistance and any of the biomass-partitioning traits or their plasticity. However, species size was negatively related to stress resistance. This tradeoff between species size and stress resistance emerges as a consistent property of fundamental importance in shaping annual plant communities along resource gradients. © 2019 Elsevier Ltd

Note:
Related Files :
Annual plants
Biomass partitioning
Functional diversity
Plant size
Reproductive effort
root-shoot ratio
Specific leaf area
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.jaridenv.2019.04.006
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
40314
Last updated date:
02/03/2022 17:27
Creation date:
05/05/2019 13:06
You may also be interested in
Scientific Publication
Plant size is related to biomass partitioning and stress resistance in water-limited annual plant communities
165

Meron, E., Department of Solar Energy and Environmental Physics, Blaustein Institutes for Desert Research, Ben-Gurion University, Sede Boqer Campus84990, Israel, Physics Department, Ben-Gurion University, Beer Sheva, 84105, Israel; Shachak, M., Mitrani Department of Desert Ecology, Blaustein Institutes for Desert Research, Ben-Gurion University, Sede Boqer Campus84990, Israel;

 

Plant size is related to biomass partitioning and stress resistance in water-limited annual plant communities

Plant functional traits are used increasingly for linking environmental conditions, community structure and ecosystem function. Traits associated with rapid resource capture may come at the expense of those related to stress resistance. In annual plants, such a tradeoff may be reflected through plant size (biomass) vs. biomass partitioning patterns, as the former represents resource capture rate while the latter represents reorganization to cope with resource stress. In a water-limited annual plant community we investigated: 1) the effects of water and nitrogen availability on plant size and biomass partitioning, i.e., biomass partitioning between organs (root to shoot ratio, R/S, and reproductive effort, Rep/Veg), and biomass partitioning in space (specific leaf area, SLA), 2) the relationship between plant size and biomass partitioning at both the interspecific and intraspecific level, and 3) the relationships between plant size and biomass partitioning strategy and stress resistance. Eight key species varying in their natural size range were grown under variable water and nitrogen availability and their size and biomass partitioning were monitored throughout their growth and at fixed phenological phases. In all species, reduced water and/or nitrogen availability was associated with smaller size, increased R/S, and decreased SLA while Rep/Veg remained constant. At the intraspecific level, plant size was negatively related to R/S and positively related to SLA. At the interspecific level, no relationship was found between size or stress resistance and any of the biomass-partitioning traits or their plasticity. However, species size was negatively related to stress resistance. This tradeoff between species size and stress resistance emerges as a consistent property of fundamental importance in shaping annual plant communities along resource gradients. © 2019 Elsevier Ltd

Scientific Publication
You may also be interested in