Newly assimilated carbon allocation in grassland communities under different grazing enclosure times

2021 ◽  
Vol 57 (4) ◽  
pp. 563-574
Author(s):  
Xuejuan Bai ◽  
Xuan Yang ◽  
Shumeng Zhang ◽  
Shaoshan An
Keyword(s):  
Carbon Allocation ◽  
Grassland Communities

Carbon allocation in grassland communities under drought stress followed by 14C pulse labeling

2012 ◽  
Vol 55 ◽  
pp. 132-139 ◽  
Author(s):  
Muhammad Sanaullah ◽  
Abad Chabbi ◽  
Cornelia Rumpel ◽  
Yakov Kuzyakov
Keyword(s):  
Drought Stress ◽  
Carbon Allocation ◽  
14C Pulse Labeling ◽  
Grassland Communities

A single drought event of 100-year recurrence enhances subsequent carbon uptake and changes carbon allocation in experimental grassland communities

2008 ◽  
Vol 171 (5) ◽  
pp. 681-689 ◽  
Author(s):  
Heydar Mirzaei ◽  
Juergen Kreyling ◽  
Mir Zaman Hussain ◽  
Yuelin Li ◽  
John Tenhunen ◽  
...  
Keyword(s):  
Carbon Allocation ◽  
Carbon Uptake ◽  
Drought Event ◽  
Grassland Communities

Species Diversity in Grassland Communities Under Different Habitat Conditions

2009 ◽  
Vol 24 (1) ◽  
pp. 43-59
Author(s):  
Magdalena Jastrzębska ◽  
Tadeusz Szarejko ◽  
Czesław Hołdyński ◽  
Wiesław Piotr Jastrzębski
Keyword(s):  
Species Diversity ◽  
Habitat Conditions ◽  
Grassland Communities

scholarly journals Separating the effects of temperature and carbon allocation on the diel pattern of soil respiration in the different phenological stages in dry grasslands

PLoS ONE ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. e0223247
Author(s):  
János Balogh ◽  
Szilvia Fóti ◽  
Marianna Papp ◽  
Krisztina Pintér ◽  
Zoltán Nagy
Keyword(s):  
Soil Respiration ◽  
Carbon Allocation ◽  
Diel Pattern ◽  
Phenological Stages ◽  
Dry Grasslands ◽  
Effects Of Temperature

scholarly journals Kog1/Raptor mediates metabolic rewiring during nutrient limitation by controlling SNF1/AMPK activity

2021 ◽  
Vol 7 (16) ◽  
pp. eabe5544
Author(s):  
Zeenat Rashida ◽  
Rajalakshmi Srinivasan ◽  
Meghana Cyanam ◽  
Sunil Laxman
Keyword(s):  
Amino Acid ◽  
Nutrient Limitation ◽  
Carbon Flux ◽  
Metabolic Flux ◽  
Carbon Allocation ◽  
Carbon Utilization ◽  
Acid Biosynthesis ◽  
Control Growth ◽  
Ampk Activity ◽  
Delayed Growth

In changing environments, cells modulate resource budgeting through distinct metabolic routes to control growth. Accordingly, the TORC1 and SNF1/AMPK pathways operate contrastingly in nutrient replete or limited environments to maintain homeostasis. The functions of TORC1 under glucose and amino acid limitation are relatively unknown. We identified a modified form of the yeast TORC1 component Kog1/Raptor, which exhibits delayed growth exclusively during glucose and amino acid limitations. Using this, we found a necessary function for Kog1 in these conditions where TORC1 kinase activity is undetectable. Metabolic flux and transcriptome analysis revealed that Kog1 controls SNF1-dependent carbon flux apportioning between glutamate/amino acid biosynthesis and gluconeogenesis. Kog1 regulates SNF1/AMPK activity and outputs and mediates a rapamycin-independent activation of the SNF1 targets Mig1 and Cat8. This enables effective glucose derepression, gluconeogenesis activation, and carbon allocation through different pathways. Therefore, Kog1 centrally regulates metabolic homeostasis and carbon utilization during nutrient limitation by managing SNF1 activity.

Sink strength of citrus rootstocks under water deficit

2021 ◽  
Author(s):  
Simone F da Silva ◽  
Marcela T Miranda ◽  
Vladimir E Costa ◽  
Eduardo C Machado ◽  
Rafael V Ribeiro
Keyword(s):  
Plant Growth ◽  
Root Growth ◽  
Water Deficit ◽  
Carbon Allocation ◽  
Sink Strength ◽  
Rangpur Lime ◽  
Carbon Supply ◽  
Valencia Orange ◽  
Source Sink ◽  
Orange Trees

Abstract Carbon allocation between source and sink organs determines plant growth and is influenced by environmental conditions. Under water deficit, plant growth is inhibited before photosynthesis and shoot growth tends to be more sensitive than root growth. However, the modulation of source-sink relationship by rootstocks remain unsolved in citrus trees under water deficit. Citrus plants grafted on Rangpur lime are drought tolerant, which may be related to a fine coordination of the source-sink relationship for maintaining root growth. Here, we followed 13C allocation and evaluated physiological responses and growth of Valencia orange trees grafted on three citrus rootstocks (Rangpur lime, Swingle citrumelo and Sunki mandarin) under water deficit. As compared to plants on Swingle and Sunki rootstocks, ones grafted on Rangpur lime showed higher stomatal sensitivity to the initial variation of water availability and less accumulation of non-structural carbohydrates in roots under water deficit. High 13C allocation found in Rangpur lime roots indicates this rootstock has high sink demand associated with high root growth under water deficit. Our data suggest that Rangpur lime rootstock used photoassimilates as sources of energy and carbon skeletons for growing under drought, which is likely related to increases in root respiration. Taken together, our data revealed that carbon supply by leaves and delivery to roots are critical for maintaining root growth and improving drought tolerance, with citrus rootstocks showing differential sink strength under water deficit.

Variations of carbon allocation and turnover time across tropical forests

2021 ◽  
Author(s):  
Hui Yang ◽  
Philippe Ciais ◽  
Yilong Wang ◽  
Yuanyuan Huang ◽  
Jean‐Pierre Wigneron ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Carbon Allocation ◽  
Turnover Time

scholarly journals Chronic fertilization and irrigation gradually and increasingly restructure grassland communities

Ecosphere ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. e02625
Author(s):  
Kaitlin Kimmel ◽  
Laura Dee ◽  
David Tilman ◽  
Isabelle Aubin ◽  
Gerhard Boenisch ◽  
...  
Keyword(s):  
Grassland Communities

scholarly journals Shoot–root carbon allocation, sugar signalling and their coupling with nitrogen uptake and assimilation

2016 ◽  
Vol 43 (2) ◽  
pp. 105 ◽  
Author(s):  
Lu Wang ◽  
Yong-Ling Ruan
Keyword(s):  
Growth And Development ◽  
Carbon Allocation ◽  
Dynamic Balance ◽  
Shoot Development ◽  
Long Distance ◽  
Root Carbon ◽  
Organ Systems ◽  
New Findings ◽  
Sugar Signalling

Roots and shoots are distantly located but functionally interdependent. The growth and development of these two organ systems compete for energy and nutrient resource, and yet, they keep a dynamic balance with each other for growth and development. The success of such a relationship depends on efficient root-shoot communication. Aside from the well-known signalling processes mediated by hormones such as auxin and cytokinin, sugars have recently been shown to act as a rapid signal to co-ordinate root and shoot development in response to endogenous and exogenous clues, in parallel to their function as carbon and energy resources for biomass production. New findings from studies on vascular fluids have provided molecular insights into the role of sugars in long-distance communications between shoot and root. In this review, we discussed phloem- and xylem- translocation of sugars and the impacts of sugar allocation and signalling on balancing root–shoot development. Also, we have taken the shoot–root carbon–nitrogen allocation as an example to illustrate the communication between the two organs through multi-layer root–shoot–root signalling circuits, comprising sugar, nitrogen, cytokinin, auxin and vascular small peptide signals.

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