From Individual Leaf Elongation to Whole Shoot Leaf Area Expansion: a Comparison of Three Aegilops and Two Triticum Species

Bultynck, Lieve; Steege, Margreet W. ter; Schortemeyer, Marcus; Poot, Pieter; Lambers, Hans

doi:10.1093/aob/mch110

Cited by 36 publications

(30 citation statements)

References 6 publications

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“…For leaf positions higher than position 5 for sun leaves and 6 for shade leaves, it was measured that maximal leaf length required shorter LED with lower accumulated temperature sum. Bultynck et al (2004) mentioned that it is due to a higher extent of leaf elongation rate and leaf width of upper leaves and in several cases it could be associated with an increase of apical dome size. At an early stage of barley development, leaf elongation increased with main stem position, as was reported earlier (Kirby et al 1982, Natr and Natrova 1992, Bultynck et al 2004.…”

Section: Resultsmentioning

confidence: 99%

Leaf growth under temperature and light control

Řepková¹,

Brestič²,

Olšovská³

2009

Plant Soil Environ.

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Dynamics of crop growth and photosynthesis are two main processes that are of major importance for adaptation of plants to their environment. Two experiments were carried out during 2005 and 2006 with sun and shaded barley plants. The results showed that leaf area increased with leaf position on the main stem up to leaf position 5 for sun and leaf position 6 for shaded plants, and then declined towards flag leaves. Air temperature affected leaf appearance, mainly at the beginning of the growing season. A positive correlation between leaf expansion duration (LED) and accumulated temperature sum was measured for both variants, LED linearly increased with temperature sum. Leaf expansion rate (LER) showed a similar dependence on accumulated air temperatures in both light variants. A strong relation was found between soil temperature and LER for the first four leaves of the main stem of shaded plants in 2006. In shaded environment the higher LER was associated with lower accumulated irradiance sum when light restriction supported an increase of leaf elongation and final leaf length.

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Section: Resultsmentioning

confidence: 99%

Leaf growth under temperature and light control

Řepková¹,

Brestič²,

Olšovská³

2009

Plant Soil Environ.

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“…According to Richards et al (2002), rapid leaf area expansion leads to rapid canopy closure, thereby reducing the evaporation from the soil surface, and thus increasing crop water-use efficiency. The species with more rapidly elongating leaf showed a faster increase with leaf position in leaf expansion rate, leaf width and leaf area, higher relative leaf area expansion rates, and more biomass allocation to leaf sheaths and less to roots (Bultynck et al, 2004). Van den Boogaard et al (1996) reported that a fast leaf area expansion rate in wheat was positively correlated with above-ground biomass and grain yield.…”

Section: Discussionmentioning

confidence: 99%

Phosphorus and Zinc Interaction Influence Leaf Area Index in Fine vs. Coarse Rice (Oryza sativa L) Genotypes in Northwest Pakistan

Amanullah¹,

Inamullah²,

Shah³

et al. 2016

JPSP

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Leaf area index (LAI) is a measure of leafiness per unit ground area and denotes the extent of photosynthetic machinery is an important growth and yield-determining factor because it is a major determinant of light interception and transpiration. Phosphorus (P) and zinc (Zn) are the most important factors affecting LAI of rice (Oryza sativa L.). A field experiment was conducted to assess the impact of phosphorus (0, 40, 80, 120 kg P/ ha) and zinc levels (0, 5, 10, 15 kg Zn/ha) on LAI of rice (O. sativa L.) genotypes (fine and coarse [Fakhr-e-Malakand and Pukhraj]). The experiment was conducted on farmer field at Batkhela, Malakadnd in Northwest Pakistan during summer 2011 and 2012. When combined over the 2 years, the data revealed that the highest LAI at three different growth stages (tillering, heading, and physiological maturity [PM]) was obtained with application of the highest P level (120 kg/ha) being at par with 80 kg P/ha, while the lowest LAI was recorded when P was not applied. Similarly, the highest LAI was obtained with application of the two higher Zn levels (10 and 15 kg Zn/ha), while the lowest LAI was recorded when Zn was not applied. In the case of rice genotypes, the highest LAI was obtained from Pukhraj than other two genotypes at all growth stages. The other two rice genotypes (Fakher-e-Malakand and Basmati-385) produced statistically similar LAI at different growth stages. The higher LAI of Pukhraj was attributed to its long and wider leaves that resulted in higher mean single leaf area, leaf area per tiller, per hill, and per square meter. The LAI was the highest at heading stage than at early (tillering) and later (PM) growth stages. The increase in LAI was attributed to the increase in tillers number and leaf area/hill. The increase in LAI showed a positive impact on crop growth rate, dry matter, and yield. Application of 120 kg P+10 kg Zn/ha to rice genotype Pukhraj was more beneficial in terms of higher LAI and productivity in the study area.

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“…Wild species related to bread wheat show remarkable genetic diversity essential to the improvement of the quality of cultivated plants. The D genome originating from A. tauschii is considered a potential donor of traits associated with the vigour of grain, including germination capacity [30,41,42]. The principal regions on D genome associated with grain germination provide a common location for the genes coding for D-type cyclins (1D) and cytochrome 450 genes (P450 gene family), spermitine synthase 1 (SPDSY 1) (7D), and protein synthase gene.…”

Section: Discussionmentioning

confidence: 99%

QTL mapping for germination of seeds obtained from previous wheat generation under drought

et al. 2014

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The QTLs controlling germination and early seedling growth were mapped using seeds acquired from mapping population and parental lines of Chinese Spring and SQ1 grown under water-limited conditions, severe drought (SDr) and well-watered plants (C). Germination ability was determined by performing a standard germination test based on the quantification of the germination percentage (GP24) of seeds incubated for 24 h at 25°C in the dark. Early seedling growth was evaluated on the basis of the length of the root and leaf at the 6th day of the experiment. QTLs were identified by composite interval mapping method using Windows QTLCartographer 2.5 software. For the traits studied, a total of thirty eight additive QTLs were identified. Seventeen QTLs were mapped in C on chromosomes: 1A, 2A, 7A, 1B, 2B, 3B, 4B, 5B, 6B, 7B, 2D, 3D, 4D and 6D, while twenty one QTLs were identified in SDr on chromosomes: 1A, 2A, 5A, 2B, 3B, 4B, 5B, 6B, 7B, 3D, 5D and 6D. Most of the QTLs for GP and early leaf growth parameters were clustered on chromosome 4B (associated with the Rht-B1 marker) both in C and SDr plants. The results indicate the complex and polygenic nature of germination.

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From Individual Leaf Elongation to Whole Shoot Leaf Area Expansion: a Comparison of Three Aegilops and Two Triticum Species

Abstract: Aegilops tauschii was the only wild species with rapid leaf expansion rates similar to those of wheat, and it achieved the highest photosynthetic rates, making it an interesting species for further study.

Cited by 36 publications

References 6 publications

Leaf growth under temperature and light control

Leaf growth under temperature and light control

Phosphorus and Zinc Interaction Influence Leaf Area Index in Fine vs. Coarse Rice (Oryza sativa L) Genotypes in Northwest Pakistan

QTL mapping for germination of seeds obtained from previous wheat generation under drought

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