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Biophysical Properties of Agricultural Crops

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Food Science and Technology".

Deadline for manuscript submissions: closed (31 January 2023) | Viewed by 3115

Special Issue Editors


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Guest Editor
Department of Biophysics, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland
Interests: physical properties of plants; agrotechnics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Agricultural, Forest and Transport Machinery, University of Life Sciences in Lublin, Głęboka 28, 20-612 Lublin, Poland
Interests: physical properties of plant raw materials; food engineering, processing and quality; renewable energy sources; biomass conversion; agricultural production; crop storage and processing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Due to the widespread desire to limit the excessive use of chemical compounds in plant production and the increasing acreage of plants, grown using ecological or integrated methods, there is a growing interest in pro-ecological methods used to improve the quality and health of seeds. These methods also include the processing of seeds using physical methods.

In plant cultivation, it is important to obtain an efficient and high-quality crop. Plants are constantly exposed to unfavorable abiotic factors (drought, cold, frost, salinity, radiation, etc.) and biotic (bacteria, fungi, etc.). The effects of ionizing, infrared, and ultraviolet radiation; ultrasound; and magnetic and gravitational fields on plant shoots and roots can be monitored at every stage of growth and development through spectrophotometric, fluorimetric, and molecular methods. The main photosynthetic pigments in plants are two types of chlorophylls: a and b. There are also auxiliary pigments called carotonoids. The mechanism of photosynthesis is based on the absorption of solar energy in the PAR range (400-700 nm) using the molecules of photosynthetic dyes in antenna complexes collecting light. The antenna complex is made up of many molecules of chlorophyll and carotenids linked to proteins. Absorbed energy in the form of excited electron dye molecules from these complexes can be transferred to the PSII and PI reaction centers and used to initiate photochemical reactions. Some energy is lost as heat or is sent as chlorophyll fluorescence. Equipment for measuring photosynthesis makes it possible to control the cultivation of crops.

Dr. Dziwulska-Hunek Agata
Dr. Mariusz Szymanek
Guest Editors

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Keywords

  • plant yield
  • ecological cultivation
  • seed quality
  • light reaction
  • protein
  • photosynthetic pigments
  • magnetic field
  • gravitational field
  • laser light
  • chlorophyll fluorescence

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Published Papers (1 paper)

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Research

19 pages, 7110 KiB  
Article
Comparative Analysis of Primary Photosynthetic Reactions Assessed by OJIP Kinetics in Three Brassica Crops after Drought and Recovery
by Jasenka Antunović Dunić, Selma Mlinarić, Iva Pavlović, Hrvoje Lepeduš and Branka Salopek-Sondi
Appl. Sci. 2023, 13(5), 3078; https://doi.org/10.3390/app13053078 - 27 Feb 2023
Cited by 19 | Viewed by 2649
Abstract
Plant drought tolerance depends on adaptations of the photosynthetic apparatus to changing environments triggered by water deficit. The seedlings of three Brassica crops differing in drought sensitivity, Brassica oleracea L. var. capitata—white cabbage, Brassica oleracea L. var. acephala—kale, and Brassica rapa [...] Read more.
Plant drought tolerance depends on adaptations of the photosynthetic apparatus to changing environments triggered by water deficit. The seedlings of three Brassica crops differing in drought sensitivity, Brassica oleracea L. var. capitata—white cabbage, Brassica oleracea L. var. acephala—kale, and Brassica rapa L. var. pekinensis—Chinese cabbage, were exposed to drought by withholding water. Detailed insight into the photosynthetic machinery was carried out when the seedling reached a relative water content of about 45% and after re-watering by analyzing the OJIP kinetics. The key objective of this study was to find reliable parameters for distinguishing drought−tolerant and drought-sensitive varieties before permanent structural and functional changes in the photosynthetic apparatus occur. According to our findings, an increase in the total performance index (PItotal) and structure–function index (SFI), positive L and K bands, total driving forces (ΔDF), and drought resistance index (DRI) suggest drought tolerance. At the same time, susceptible varieties can be distinguished based on negative L and K bands, PItotal, SFI, and the density of reaction centers (RC/CS0). Kale proved to be the most tolerant, Chinese cabbage was moderately susceptible, and white cabbage showed high sensitivity to the investigated drought stress. The genetic variation revealed among the selected Brassica crops could be used in breeding programs and high-precision crop management. Full article
(This article belongs to the Special Issue Biophysical Properties of Agricultural Crops)
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