Quantifying sink and source limitations on dry matter partitioning to fruit growth in peach trees

1995 ◽  
Vol 95 (3) ◽  
pp. 437-443 ◽  
Author(s):  
Theodore M. DeJong ◽  
Yaffa L. Grossman
Keyword(s):  
Dry Matter ◽  
Fruit Growth ◽  
Dry Matter Partitioning ◽  
Peach Trees

scholarly journals Developmental and Environmental Control of Dry Matter Partitioning in Peach

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 551C-551
Author(s):  
T.M. DeJong
Keyword(s):  
Environmental Conditions ◽  
Dry Matter ◽  
Environmental Control ◽  
Dry Matter Partitioning ◽  
Environmental Signals ◽  
Growth Capacity ◽  
Organ Type ◽  
Organ Specific ◽  
Peach Trees ◽  
Maintenance Requirements

For the last several years, research in my laboratory has been focused on studying the developmental and environmental control of dry matter partitioning in peach trees based on the concept that plants grow as collections of semi-autonomous, but interacting, organs. This concept assumes that plant genotype, triggered by developmental and environmental signals, determines current organ specific growth potentials and that environmental conditions dictate conditional growth capacity and respiration (both growth and maintenance) requirements of each organ at any specific time. Dry matter partitioning at any given time is then determined by the availability of resources to be partitioned, the conditional growth capacity and maintenance requirements of each organ, and the relative ability of each organ to compete for the resources. In this presentation, I will demonstrate how developmental patterns of various organs influence dry-matter partitioning within the tree over time, how organ number can influence the amount of dry-matter partitioned collectively to an organ type, and propose an hypothesis for how environmental conditions may influence partitioning on a diurnal basis.

scholarly journals Dry Matter Distribution of Three Peach Growth Types

HortScience ◽  
1994 ◽  
Vol 29 (12) ◽  
pp. 1481-1483 ◽  
Author(s):  
Daniela Giovannini ◽  
D. Michael Glenn ◽  
Ralph Scorza ◽  
W.V. Welker
Keyword(s):  
Dry Matter ◽  
Prunus Persica ◽  
Leaf Tissue ◽  
Woody Tissue ◽  
Dry Matter Partitioning ◽  
Dry Matter Distribution ◽  
High Productivity ◽  
Management Techniques ◽  
Peach Trees ◽  
Size Controlled

Our objective was to evaluate the dry-matter partitioning between the roots and shoots of two genetically size-controlled peach [Prunus persica (L.) Batsch] types, dwarf and pillar, compared to a full-sized standard peach type. Compared to the pillar and standard types, the dwarf type had a reduced leaf: root ratio, less allocation of dry matter to woody tissue and more to leaf tissue. Genetically size-controlled peach trees have a smaller root system, but a lower leaf: root ratio and may require modified soil and water management techniques to ensure high productivity.

Dry Matter Partitioning and Vegetative Growth of Young Peach Trees Under Water Stress

1990 ◽  
Vol 17 (1) ◽  
pp. 23 ◽  
Author(s):  
SL Steinberg ◽  
JC Miller ◽  
MJ Mcfarland
Keyword(s):  
Water Stress ◽  
Biomass Production ◽  
Dry Matter ◽  
Root Production ◽  
Total Biomass ◽  
Leaf Production ◽  
Dry Matter Partitioning ◽  
Two Factors ◽  
The Difference ◽  
Peach Trees

Water stress affected the growth and dry matter partitioning of young peach trees grown in pots in a greenhouse. When the trees were subjected to four watering treatments, 100, 75, 50 and 25% of full water, total dry matter production was reduced with each incremental decrease in applied water. Despite large differences in biomass production, the difference in midday leaf water potential between the wettest and driest treatment was not greater than 0.6 MPa. This was partially attributed to lower leaf conductance in the drier treatments. A reduction or halting of lateral branching and new leaf production was observed soon after water stress was imposed, and these two factors were the major contributors to differences in tree biomass production. Root production was maintained at similar levels in all but the severest stress treatment. As a result, the root fraction of total biomass increased from 0.4 to 0.6 as the level of stress increased from 75 to 50% of full water. Currently growing leaves and internodes of the drier treatments reached maturity at a smaller size. In contrast to internode lengthening, leaf area expansion slowed in the final growth phase. This correlated well with leaf unfolding.

scholarly journals Dry matter partitioning models for the simulation of individual fruit growth in greenhouse cucumber canopies

2011 ◽  
Vol 108 (6) ◽  
pp. 1075-1084 ◽  
Author(s):  
Dirk Wiechers ◽  
Katrin Kahlen ◽  
Hartmut Stützel
Keyword(s):  
Dry Matter ◽  
Fruit Growth ◽  
Dry Matter Partitioning ◽  
Greenhouse Cucumber

scholarly journals Differential Effects of Shade on Early-season Fruit and Shoot Growth Rates in `Empire' Apple

HortScience ◽  
1998 ◽  
Vol 33 (5) ◽  
pp. 823-825 ◽  
Author(s):  
M. Bepete ◽  
A.N. Lakso
Keyword(s):  
Growth Rate ◽  
Growth Rates ◽  
Dry Matter ◽  
Growth Stage ◽  
Shoot Growth ◽  
Fruit Growth ◽  
Dry Matter Partitioning ◽  
Early Season ◽  
Differential Effects

To determine relative dry-matter partitioning to early-season growth of extension shoots vs. fruits under competitive conditions in the shade, heavily cropping branch sections of `Empire' apple (Malus ×domestica Borkh.) were girdled and shaded to 15%, 40%, and 60% of available light for 9 days, while control branches were girdled and fully exposed. Treatments were applied at both 17 and 27 days after bloom, when fruit diameters averaged 13 and 23 mm, and the number of unfolded leaves on extension shoots averaged 13 and 19, respectively. Fruit diameters, extension shoot lengths, and numbers of unfolded leaves were monitored on the treated branches. Shoot growth was not affected by shading at either growth stage. Fruit growth rate was similar at 100% and 60% available light, but declined 25% at 40% available light and 50% at 15% available light. These results indicate that shoot growth has priority over fruit growth for partitioning in light-limiting conditions early in the season.

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