Effects of ozone on growth, yield and leaf gas exchange rates of two Bangladeshi cultivars of wheat (Triticum aestivum L.)

Use of leaf gas exchange measurement enhances the characterization of growth, yield, physiology, and abiotic stress response in grapevines. Accuracy of a crop response model depends upon sample size, which is often limited due to the prolonged time needed to complete gas exchange measurement using currently available infra-red gas analyzer systems. In this experiment, we measured mid-day gas exchange of excised and in situ leaves from field grown wine grape (Vitis vinifera) cultivars. Depending upon cultivar, we found measuring gas exchange on excised leaves under a limited time window post excision gives similar accuracy in measurement of gas exchange parameters as in situ leaves. A measurement within a minute post leaf excision can give between 96.4 and 99.5% accuracy compared to pre-excision values. When compared to previous field data, we found the leaf excision technique reduced time between consecutive gas exchange measurements by about a third compared to in situ leaves (57.52 ± 0.39 s and 86.96 ± 0.41 s, for excised and in situ, respectively). Therefore, leaf excision may allow a 50% increase in experimental sampling size. This technique could solve the challenge of insufficient sample numbers, often reported by researchers worldwide while studying grapevine leaf gas exchange using portable gas exchange systems under field conditions.

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The dynamics of potassium uptake and use, leaf gas exchange and root growth throughout plant phenological development and its effects on seed yield in wheat (Triticum aestivum) on a low-K sandy soil

Plant and Soil ◽

10.1007/s11104-013-1812-z ◽

2013 ◽

Vol 373 (1-2) ◽

pp. 373-384 ◽

Cited By ~ 15

Author(s):

Qifu Ma ◽

Craig Scanlan ◽

Richard Bell ◽

Ross Brennan

Keyword(s):

Triticum Aestivum ◽

Gas Exchange ◽

Root Growth ◽

Seed Yield ◽

Sandy Soil ◽

Leaf Gas Exchange ◽

Potassium Uptake ◽

Low K

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Biochar amendment improves shoot biomass of tomato seedlings and sustains water relations and leaf gas exchange rates under different irrigation and nitrogen regimes

Agricultural Water Management ◽

10.1016/j.agwat.2020.106580 ◽

2021 ◽

Vol 245 ◽

pp. 106580

Author(s):

Lili Guo ◽

Marie Louise Bornø ◽

Wenquan Niu ◽

Fulai Liu

Keyword(s):

Gas Exchange ◽

Exchange Rates ◽

Water Relations ◽

Leaf Gas Exchange ◽

Shoot Biomass ◽

Tomato Seedlings ◽

Biochar Amendment

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Comparative Efficacy of Bio-organic and Mineral Phosphate on the Growth, Yield and Economics of Wheat (Triticum aestivum L.) Grown by Different Methods

Communications in Soil Science and Plant Analysis ◽

10.1080/00103624.2016.1253722 ◽

2016 ◽

Vol 48 (1) ◽

pp. 73-82 ◽

Cited By ~ 1

Author(s):

Ahmad Khakwani ◽

Muhammad Imran ◽

Iftikhar Ahmad ◽

Rashid Waqas ◽

Sabir Hussain ◽

...

Keyword(s):

Triticum Aestivum ◽

Growth Yield ◽

Triticum Aestivum L ◽

Comparative Efficacy ◽

Mineral Phosphate

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Diurnal Time Course of Leaf Gas Exchange Rates and Related Characters in Drought-Acclimated and Irrigated Trifolium Subterraneum.

Functional Plant Biology ◽

10.1071/pp9950461 ◽

1995 ◽

Vol 22 (3) ◽

pp. 461 ◽

Cited By ~ 6

Author(s):

J Vadell ◽

C Cabot ◽

H Medrano

Keyword(s):

Gas Exchange ◽

Exchange Rates ◽

Water Use Efficiency ◽

Water Use ◽

Leaf Gas Exchange ◽

Trifolium Subterraneum ◽

Co2 Assimilation ◽

Carbon Gain ◽

Assimilation Rate ◽

Use Efficiency

The effects of drought acclimation on the diurnal time courses of photosynthesis and related characters were studied in Trifolium subterraneum L. leaves during two consecutive late spring days. Leaf CO2 assimilation rate and transpiration rate followed irradiance variations in irrigated plants. Under drought, a bimodal pattern of leaf CO2 assimilation rate developed although stomatal conductance remained uniform and low. Instantaneous water-use efficiency was much higher in droughted plants during the early morning and late evening, while during the middle of the day it was close to the value of irrigated plants. Net carbon gain in plants under drought reached 40% of the carbon gain in irrigated plants with a significant saving of water (80%). Average data derived from midday values of leaf CO2 assimilation rates and instantaneous water-use efficiency did not provide good estimates of the daily carbon gain and water-use efficiency for droughted leaves. Coupled with the morphological changes as a result of acclimation to progressive drought, modifications of diurnal patterns of leaf gas exchange rates effectively contribute to a sustained carbon gain during drought. These modifications significantly improve water-use efficiency, mainly by enabling the plant to take advantage of morning and evening hours with high air humidity.

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