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Communications in Plant Sciences, vol 7, issue 12, p.44-48, 2017 (2017007)
Full title: Differential influence of shoot extracts of winter cover crops on seed germination of corn, soybean and indicator plants
Authors: Mirian Fracasso Fabiani, Leonardo Bianco de Carvalho, and Pedro Luis da Costa Aguiar Alves
Abstract: The objective was to test the response of summer crops (Zea mays and Glycine max) and indicator plants to exposure to extracts of winter cover crops (Avena sativa, Lolium multiflorum and Triticum aestivum) regarding on seed germination. Bioassays were carried out to test six shoot extract concentrations, by using germitest paper maintained in controlled conditions. Zea mays, Glycine max, Lactuca sativa and Phalaris canariensis showed differential response to exposure to shoot extracts of Avena sativa, Lolium multiflorum and Triticum aestivum regarding on seed germination. Shoot extracts of Avena sativa and Lolium multiflorum increased seed germination while shoot extract of Triticum aestivum reduced seed germination of Zea mays. Shoot extracts of Avena sativa, Lolium multiflorum and Triticum aestivum reduced seed germination of Glycine max, Lactuca sativa and Phalaris canariensis.
Winter cover crops can show different allelopathic potential on summer crops.
Keywords: Allelopathic potential, Avena sativa, Lolium multiflorum, Triticum aestivum, Summer crops, Major crops.
Communications in Plant Sciences, vol 7, issue 12, p.34-43, 2017 (2017006)
Full title: A testimony of inter-plant communication through electrophysiological signal analysis
Authors: Kavya Sai Yaddanapudia, Neetu Soodb, and Indu Sainic
Abstract: Plant responses to changes in environment are allied with electrical excitability, signaling and are observed by their electrophysiological signals. Similarly communication in between various plants is noticed by continuous monitoring of their electrophysiological signals at same instant comparatively. Signal acquisition is done with help of BIOPAC®MP36 set up. Two plants of different species connected to two different channels at a time clearly visualized the amplitudes and frequencies with which plants pulsated during their sensory perception, communication and adaptation to eventual stimuli. The variation in signal potentials of plants depend upon intensity of stimulus perceived either from environment or neighboring plant. They communicate with each other through electrical signals using air as a medium; they are conscious enough to aware neighborhood about hazards and threats. This paper presents in detail the potential and frequency variations that plants illustrate during Inter-plant communication.
The meticulous sensory perception of plants when they endure mechanical, heat and chemical stimuli clearly revealed that plants are highly sensitive to environmental changes. The communication in plants is not only intra-specific but from experimental results it is concluded that plants are good enough in stress/danger perception and self-defense clearly inter-plant communication exists.
Keywords: Action potential, Variation potential, Amplitude, Frequency, Depolarization, Hyperpolarization.
Communications in Plant Sciences, vol 7, issue 12, p.27-33, 2017 (2017005)
Full title: Path analysis and traits correlation in soybean
Authors: Fabiano Faria Bisinotto, Osvaldo Toshiuki Hamawaki, Ana Paula Oliveira Nogueira, Raphael Lemes Hamawaki, Jacqueline Siqueira Glansenapp, and Cristiane Lemes Hamawaki
Abstract: This work aimed to study agronomic traits of soybean genotypes by path analysis and correlation estimates. We have used a randomized complete block design to assess 35 soybean genotypes with three replications, which 31 lines were from the breeding program of the Federal University of Uberlândia, Brazil, plus four commercial cultivars. We have assessed features number of days to the blooming, plant height at blooming, number of days to maturity, plant height at maturity, first pod height, number of nodes on the main stem at maturity, number of pods with one, two and three seeds per plant, total number of pods per plant, number of seeds per pod and grain yield. The features plant height at maturity and number of nodes at maturity have presented significant correlations phenotypic and genotypic positive. 100-seed weight was positively correlated with grain yield shown high direct phenotypic and genotypic effects being, therefore, useful for indirect selection aiming the grain yield increase.
The approaches correlation and path analysis of agronomic traits of major importance in soybean lines are efficient in assessing interconnections between yield and other agronomic traits in soybean. The features plant height at maturity and number of nodes are positively correlated. 100-seed weight is positively correlated to grain yield, and correlations between the number of days to the blooming and average weight of 100 seeds are negative.
Keywords: Glycine max, Grain yield, Agronomic traits.
Communications in Plant Sciences, vol 7, issue 12, p.20-26, 2017 (2017004)
Full title: Plant phenolic compounds and health benefits
Authors: Oluwole Oladeji and Funmilayo Adelowo
Abstract: The growing rate of the activities of microbes increases every day. Virtually everything that surrounds man are contaminated and polluted with these microbes. These contaminations have led to some infectious and contagious diseases some of which are curable and others deadly. The advancement in Science and Technology have helped reduced this problems to certain level. In doing this, different researches have been carried out on medicinal plants in order to combat these problems. In this research, phenolic compounds were found broadly distributed in the plant kingdom and are the most abundant secondary metabolites of plants. They are reactive metabolites in a wide range of plant-derived foods and mainly divided in four groups: phenolic acids, flavonoids, stilbenes and tannins. They work as terminators of free radicals and chelators of metal ions that are capable of catalyzing lipid oxidation. Therefore, this review examines the functional properties of phenolics and their health benefits.
The introduction of natural antimicrobial and antioxidant agents that are environmental friendly and non-pollutant or contaminate the environment are inevitable.
Keywords: Chelators, Free radicals, Lipid oxidation, Microbes, Phenolics, Phenolic compounds, Secondary metabolites.
Communications in Plant Sciences, vol 7, issue 12, p.15-19, 2017 (2017003)
Full title: Induction of indirect somatic embryogenesis in Borneo ironwood
Authors: Gibson Entuni and Rebicca Edward
Abstract: Induction of indirect somatic embryogenesis in Eusideroxylon zwageri, an endangered and hardest timber tree species in Borneo tropical rainforest, was initiated from immature leaves. Embryogenic callus cultures were induced on Murashige and Skoog medium (MS) containing 3% sucrose, 0.24% Gelrite, and various concentrations and combinations of BAP, NAA and GA3 after 4 weeks of culture in darkness. A higher response (76%) of embryogenic callus was induced on MS medium with 1.0 mg L-1 BAP, 0.5 mg L-1 NAA and 1.0 mg L-1 GA3. Higher numbers of globular- (31), heart- (30), torpedo-(28), and cotyledon-stage (25) embryos per explant were obtained by culturing embryogenic callus on MS with 3% sucrose, 0.24% Gelrite without plant growth regulators after 8 weeks culture in darkness. These results on the induction of indirect somatic embryo in E. zwageri could be used for mass propagation and to select useful traits of this tree species at the cellular level. However, further work needs to be done on the conversion of the regenerated embryos.
Murashige-Skoog medium is effective for the induction of indirect somatic embryogenesis in Eusideroxylon zwageri by using leaf as the main source of the explant.
Keywords: Eusideroxylon zwageri, Embryogenic callus, Timber, Somatic embryos.
Communications in Plant Sciences, vol 7, issue 12, p.10-14, 2017 (2017002)
Full title: Anatomical variations in stomatal attributes of selected species of family Asteraceae
Authors: Muhammad Asif Tahir, Rizwan Sarwar, Sajid Safeer, Imran Hamza, and Muhammad Faraz Khan
Abstract: In order to document stomatal characters which are significant in taxonomy, a detailed microscopic study on leaf epidermis of the selected taxa from Asteraceae was carried out. The plant species were Sonchus oleraceus, Bidens bipinnata, Centaurea iberica, Conyza bonariensis, Helianthus annuus, Lectuca serriola, Parthenium hysterophorus, Tagetes erecta, Cosmos sulphureus, Launaea procumbens, Zinnia elegan, Galinsoga parviflora and Conyza canadensis. All the species were amphistomatic and four types of stomata i.e., tetracytic, anomocytic, anisocytic and tricytic were recognized. Tetracytic stomatal type was dominant followed by anomocytic. Stomatal density was high on abaxial epidermis than adaxial epidermis except in Conyza bonariensis and Conyza canadensis. Highest stomatal density was in Tagetes erecta while lowest in Conyza canadensis. In lower epidermis stomatal index was higher in Sonchus oleraceus followed by Bidens bipinnata and Tagetes erecta while in upper epidermis highest index was shown by Cosmos sulphureus. Stomatal aperture and guard cell size and density were also significant features in these species.
The study indicates the significance of micromorphological characters in identification of plant species.
Keywords: Stomata, Asteraceae, Epidermis, Taxa, Pakistan.