scholarly journals Plasticity and the role of mass‐scaling in allocation, morphology, and anatomical trait responses to above‐ and belowground resource limitation in cultivated sunflower ( Helianthus annuus L.)

Plant Direct ◽  
2020 ◽  
Vol 4 (10) ◽  
Author(s):  
Yan Wang ◽  
Lisa A. Donovan ◽  
Andries A. Temme
Keyword(s):  
Helianthus Annuus ◽  
Resource Limitation ◽  
Mass Scaling ◽  
Helianthus Annuus L ◽  
Anatomical Trait

scholarly journals Plasticity and the role of mass-scaling in allocation, morphology and anatomical trait responses to above and belowground resource limitation in cultivated sunflower (Helianthus annuus L.)

2018 ◽  
Author(s):  
Yan Wang ◽  
Lisa A. Donovan ◽  
Andries A. Temme
Keyword(s):  
Nutrient Limitation ◽  
Helianthus Annuus ◽  
Specific Root Length ◽  
Resource Limitation ◽  
List Type ◽  
Multiple Trait ◽  
Mass Scaling ◽  
Organ Specific ◽  
The Face

AbstractIn the face of resource limitations, plants show plasticity in multiple trait categories, including biomass allocation, morphology and anatomy, yet inevitably also grow less. The extent to which passive mass-scaling plays a role in trait responses that contribute to increased potential for resource acquisition are poorly understood. Here we assessed the role of mass-scaling on the direction, magnitude and coordination of trait plasticity to light and/or nutrient limitation in cultivated sunflower (Helianthus annuus).We grew seedlings of ten sunflower genotypes for three weeks in a factorial of light (50% shade) and nutrient (10% supply) limitation in the greenhouse and measured a suite of allocational, morphological and anatomical traits for leaves, stems, fine roots, and tap roots.Under resource limitation, plants were smaller and more biomass was allocated to the organ capturing the most limiting resource, as expected. Traits varied in the magnitude of plasticity and the extent to which the observed response was passive (scaled with plant mass) and/or had an additional active component. None of the allocational responses were primarily passive. Plastic changes to specific leaf area and specific root length were primarily active, and adjusted towards more acquisitive trait values under light and nutrient limitation, respectively. For many traits, the observed response was a mixture of active and passive components, and for some traits the active adjustment was antagonistic to the direction of passive adjustment, e.g. stem height, and tap root and stem theoretical hydraulic conductance. Passive scaling with size played a major role in the coordinated response to light, but correcting for mass clarified that the active responses to both limitations were more similar in magnitude, although still resource and organ specific.Our results demonstrate that both passive plasticity and active plasticity can contribute to increased uptake capacity for limiting resources in a manner that is resource, organ and trait specific. Indeed, passive adjustments (scaling with mass) of traits due to resource stress extends well beyond just mass allocation traits. For a full understanding of plants response to environmental stress both passive and active plasticity needs to be taken into account.

A genotype-independent system of regeneration from cotyledons of sunflower (Helianthus annuus L.) The role of ethylene

Plant Science ◽  
1992 ◽  
Vol 86 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Khalid M.B. Chraibi ◽  
Jean-Claude Castelle ◽  
Alain Latche ◽  
Jean-Paul Roustan ◽  
Jean Fallot
Keyword(s):  
Helianthus Annuus ◽  
Independent System ◽  
Helianthus Annuus L

The Role of the Peripheral Cell Layers in the Geotropic Curvature of Sunflower Hypocotyls: a New Model of Shoot Geotropism

1977 ◽  
Vol 4 (3) ◽  
pp. 337 ◽  
Author(s):  
R Firn ◽  
J Digby
Keyword(s):  
Helianthus Annuus ◽  
Growth Regulator ◽  
Differential Rate ◽  
Lateral Movement ◽  
Differential Growth ◽  
Peripheral Cell ◽  
New Model ◽  
Helianthus Annuus L ◽  
Cell Layers

The rate of elongation of sunflower (Helianthus annuus L.) hypocotyl sections was found to be dependent on the rate of growth of the outermost cell layers (peripheral cell layers) of that tissue. Hypocotyl sections from which those layers had teen peeled grew but did not show typical geotropic curvature. A model of geotropic curvature is proposed where the differential growth causing curvature is due to a differential rate of elongation between the upper and lower peripheral cell layers of a horizontal shoot. In the model it is speculated that the peripheral cell layers are the site of both geoperception and georesponse. The model does not involve a lateral movement of a growth regulator and experiments with longitudinally bisected hypocotyl sections provided evidence consistent with this model but inconsistent with the Cholodny-Went theory of geotropism.

The indirect role of 2,4-D in the maintenance of apical dominance in decapitated sunflower seedlings (Helianthus annuus L.)

Planta ◽  
1979 ◽  
Vol 146 (4) ◽  
pp. 475-480 ◽  
Author(s):  
B. T. Brown ◽  
C. Foster ◽  
J. N. Phillips ◽  
B. M. Rattigan
Keyword(s):  
Helianthus Annuus ◽  
Apical Dominance ◽  
Helianthus Annuus L

Functional role of the MADS-Box transcriptional factor HAM59 in the flower development in Helianthus annuus L.

2013 ◽  
Vol 448 (1) ◽  
pp. 32-34
Author(s):  
E. S. Sizeneva ◽  
O. A. Shul’ga ◽  
A. V. Shchennikova ◽  
K. G. Skryabin
Keyword(s):  
Helianthus Annuus ◽  
Flower Development ◽  
Functional Role ◽  
Transcriptional Factor ◽  
Mads Box ◽  
Helianthus Annuus L
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