Related Papers
Horticulturae
Grapevine Response to Stress Generated by Excessive Temperatures during the Budburst
2022 •
Stefano Poni
At springtime, the formation of stem somatic traits (stem elongation and leaf growth) and reproductive activity (flowering and fruit set) occur simultaneously. They are all competing carbon sinks, with an extremely high demand for carbohydrates. The shoot growth rate is strongly related to environmental temperature, which, according to climate change scenarios, is expected to increase also in extremes. Our hypothesis was that the increase in temperature during budburst could increase the vegetative carbon sink strength reducing the carbon stock available for the reproductive activity jeopardizing flowering of the next year. In our experiment, we artificially conditioned grapevine budburst by exposing the growing shoots to different temperature regimes. Higher temperatures during the spring vegetative growth favored shoot stem extension at the detriment of shoot leaf area. This caused a reduction in vine CO2 assimilation, which, combined with the competition of the growing vegetative...
Hortscience
Photoassimilate Production and Distribution in Cherry
1999 •
Desmond Layne
HortScience
Photoassimilate Production and Distribution in Stone Fruit
Desmond Layne
Resource partitioning between individual sink organs is dependent upon the supply of carbon from current photosynthesis and reserves, the relative ability of the translocation system to deliver resources to the sinks, and the strength or competitive ability of the sinks. To comprehend photoassimilate distribution in Prunus, one must have a general understanding of habitat, growth patterns, and changes in sink demand over the life cycle and seasonal development of the plant. In this review, we describe assimilation rates for the major Prunus species and general dry matter allocation patterns, with emphasis on environmental and biological factors that effect photosynthesis, partitioning, and control. The following factors will be covered: annual growth, changes with tree age, environmental and biological factors that effect photosynthesis, genetic factors, water, light, fruiting, and pruning.
PLOS ONE
Peach Water Relations, Gas Exchange, Growth and Shoot Mortality under Water Deficit in Semi-Arid Weather Conditions
2015 •
Michel Génard, Gilles Vercambre
Functional Plant Biology
Vigour reduction in girdled peach trees is related to lower midday stem water potentials
2014 •
Theodore Dejong
Stem or trunk girdling is a technique used in physiological studies and in horticultural practice for interrupting carbon flow through the phloem to other parts of the plant without influencing water flow in the xylem. Trunk girdling in peaches is practiced primarily to stimulate fruit growth but it also tends to decrease shoot vigour for a period of time after girdling. Water flow through the trunk or branches of peach trees is thought to be primarily dependent on the most recently formed ring of xylem and vegetative growth is closely related to stem water potential and stem hydraulic conductance. The aim of the present work was to determine whether vigour reduction due to girdling was correlated with a reduction in midday stem water potential during the period of time between girdling and the subsequent healing of stem tissue. ‘Springcrest’ peach trees were girdled on two different dates. Fruit yield and size, water sprout growth, proleptic shoot growth and stem water potential we...
Annals of Botany
Variations in leaf growth parameters within the tree structure of adult Coffea arabica in relation to seasonal growth, water availability and air carbon dioxide concentration
Miroslava Rakocevic
Trees
Carbon allocation in fruit trees: from theory to modelling
2008 •
Michel Génard, Gilles Vercambre
Dwarfing mechanisms of Prunus species as interstems and rootstocks on peach [Prunus persica (L.) Batsch] tree vegetative growth and physiology
2008 •
Antonio Weibel
Plant Growth Regulation
The vegetative growth assists to reproductive responses of Arabic coffee trees in a long-term FACE experiment
Heloisa F Filizola
In simulation studies of Arabic coffee plants under the future CO 2 conditions, no data about flowering, yield fractions or beverage sensorial have been reported. It was hypothesized that elevated CO 2 (e[CO 2 ]) would improve the leaf-gas exchange responses, assisting in improvement of coffee reproduction. The aim was to estimate leaf-gas exchange dynamics, flowering, fruiting intensity and quality in Coffea arabica grown in long-term FACE experiment under rainfed conditions. Leaf-gas exchanges were followed for five years during vegetative and reproductive stages; flowering was observed at second order axis scale for 4 years; berry production, its fractions and beverage sensorial were estimated at plot scale in the 4th production year under FACE. Young coffee plants did not modify leaf-gas exchange responses under e[CO 2 ] in observed periods, while the adult ones increased leaf-photosynthesis in all observed stages. Stomatal conductance and water use efficiency were higher under e[CO 2 ] than actual [CO 2 ] in some stages of flowering, berry expansion and ripping, benefited from higher water content over the soil profile in advanced years of FACE. Elevated CO 2 mitigated the effects of anomalous drought and high temperatures in rainy season, reducing the abnormal reproductive structures rate. Under e[CO 2 ], the intense leaf-photosynthesis did not improve the yield or sensorial beverage quality in 4th production year, but a fraction of green berries, indicating flowering delay or prolongated ripening. The e[CO 2 ] supported species survival during short intensive drought through high carbon investments in reproduction, while long/anomalous droughts reduced the fraction of flower abnormalities, indicating carbon investments in individual plant survival.
Effect of elevated carbon dioxide concentration on photosynthetic and transpiration rate in Sandal (Santalum album L
IAEES Publications
Sandalwood (Santalum album L.) belongs to family Santalaceae. It has gained prominence over other tree species, because of high demand for heartwood and essential oil, to fulfill the increasing demand it is needed to achieve fast growth of the seedling in the nursery stage and as well in the planted site. In the present study the response of elevated carbon dioxide concentration on photosynthetic and transpiration rate in sandal was assessed with the following treatments control (ambient condition), elevated CO 2 treatment with FYM (i.e., 3, 6, 9, 12 and 15 kg of FYM) and elevated CO 2 treatment with no FYM. The morphological parameters such as plant height, collar diameter, and number of leaves, leaf area, seedling biomass; physiological parameter such as photosynthetic rate, transpiration rate, and stomatal conductance were recorded at 120 days. Growth parameters found to be higher in the treatment of elevated CO 2 with 15 kg FYM such as seedling height (26.32 cm) and leaf area per plant (247.84 cm 2) compare to the other treatments. Photosynthetic rate (19.66 µ mol. m-2 s-1), transpiration rate (3.04 m mol. m-2 s-1) and stomatal conductance (0.30 m mol. m-2 s-1) was found maximum in 15 kg FYM treatment.
