Model-assisted evaluation of crop load effects on stem diameter variations and fruit growth in peach

被引：13
|
作者：
De Swaef, Tom [1 ,2 ]
Mellisho, Carmen D. [2 ,3 ]
Baert, Annelies [2 ]
De Schepper, Veerle [2 ]
Torrecillas, Arturo [3 ]
Conejero, Wenceslao [3 ]
Steppe, Kathy [2 ]
机构：
[1] Inst Agr & Fisheries Res ILVO, Plant Sci Unit, B-9090 Melle, Belgium
[2] Univ Ghent, Fac Biosci Engn, Dept Appl Ecol & Environm Biol, Plant Ecol Lab, B-9000 Ghent, Belgium
[3] CSIC, Ctr Edafol & Biol Aplicada Segura, Dpto Riego, Murcia, Spain
来源：
TREES-STRUCTURE AND FUNCTION | 2014年 / 28卷 / 06期
关键词：
Prunus persica (L.) Batsch; Dendrometers; Stem radius changes; Carbon relations; Water relations; Mechanistic modelling; DAILY TRUNK SHRINKAGE; WATER-STRESS; SAP FLOW; APPLE-TREES; REFERENCE VALUES; SUGAR-TRANSPORT; PRESSURE PROBE; TOMATO FRUIT; ROOT-GROWTH; SOIL-WATER;
D O I：
10.1007/s00468-014-1069-z
中图分类号：
S7 [林业];
学科分类号：
0829 ; 0907 ;
摘要：
Key message The paper identifies and quantifies how crop load influences plant physiological variables that determine stem diameter variations to better understand the effect of crop load on drought stress indicators. Stem diameter (D (stem)) variations have extensively been applied in optimisation strategies for plant-based irrigation scheduling in fruit trees. Two D (stem) derived water status indicators, maximum daily shrinkage (MDS) and daily growth rate (DGR), are however influenced by other factors such as crop load, making it difficult to unambiguously use these indicators in practical irrigation applications. Furthermore, crop load influences the growth of individual fruits, because of competition for assimilates. This paper aims to explain the effect of crop load on DGR, MDS and individual fruit growth in peach using a water and carbon transport model that includes simulation of stem diameter variations. This modelling approach enabled to relate differences in crop load to differences in xylem and phloem water potential components. As such, crop load effects on DGR were attributed to effects on the stem phloem turgor pressure. The effect of crop load on MDS could be explained by the plant water status, the phloem carbon concentration and the elasticity of the tissue. The influence on fruit growth could predominantly be explained by the effect on the early fruit growth stages.
引用
收藏
页码：1607 / 1622
页数：16
相关论文
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    Carmen D. Mellisho
    Annelies Baert
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    Wenceslao Conejero
    Kathy Steppe
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