Determinants and polynomial root structure

Abstract The influence of aquaporin (AQP) activity on plant water movement remains unclear, especially in plants subject to unfavorable conditions. We applied a multitiered approach at a range of plant scales to (i) characterize the resistances controlling water transport under drought, flooding and flooding plus salinity conditions; (ii) quantify the respective effects of AQP activity and xylem structure on root (Kroot), stem (Kstem) and leaf (Kleaf) conductances, and (iii) evaluate the impact of AQP-regulated transport capacity on gas exchange. We found that drought, flooding and flooding-salinity reduced Kroot and root AQP activity in Pinus taeda, whereas Kroot of the flood-tolerant Taxodium distichum did not decline under flooding. The extent of the AQP-control of transport efficiency varied among organs and species, ranging from 35%-55% in Kroot to 10%-30% in Kstem and Kleaf. In response to treatments, AQP-mediated inhibition of Kroot rather than changes in xylem acclimation controlled the fluctuations in Kroot. The reduction in stomatal conductance and its sensitivity to vapor pressure deficit were direct responses to decreased whole-plant conductance triggered by lower Kroot and larger resistance belowground. Our results provide new mechanistic and functional insights on plant hydraulics that are essential to quantifying the influences of future stress on ecosystem function.

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Effects of Phospholipase A2 on Lumbar Nerve Root Structure and Function

Spine ◽

10.1097/00007632-199705150-00002 ◽

1997 ◽

Vol 22 (10) ◽

pp. 1057-1064 ◽

Cited By ~ 58

Author(s):

Chaoyang Chen ◽

John M. Cavanaugh ◽

Cuneyt A. Ozaktay ◽

Srinivasu Kallakuri ◽

Albert I. King

Keyword(s):

Phospholipase A2 ◽

Nerve Root ◽

Structure And Function ◽

Root Structure ◽

Lumbar Nerve Root ◽

And Function

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Lead-Tolerant Bacteria Can Minimize Lead Toxicity in Plants

RADS Journal of Biological Research & Applied Sciences ◽

10.37962/jbas.v9i1.135 ◽

2018 ◽

Vol 9 (1) ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Tehreem Aslam ◽

Ambreen Ahmed

Keyword(s):

Zea Mays ◽

Anthropogenic Activities ◽

Soil Health ◽

Lead Toxicity ◽

Polluted Soil ◽

Root Structure ◽

Lead Uptake ◽

Soil Lead ◽

Health Promoting ◽

World Environment

In todayâ€™s world, environment is exposed to lead due to various anthropogenic activities. It adversely affects plants as well as microorganisms by disturbing soil health and fertility. Bioremediation is a technique used to sequester heavy metals from the contaminated soil and it can be used to decontaminate the polluted soil. Lead-tolerant plant health promoting rhizobacteria (PHPR) can be used to enhance the efficacy of lead remediation. Lead uptake can be enhanced through bacteria by modifying root structure, secreting metal sequestering molecules in rhizosphere and alleviating lead induced phytotoxicity. For this purpose, lead-resistant auxin-producing bacteria were isolated from the rhizosphere of some plants. These auxin-producing lead-tolerant bacteria were used to treat Zea mays both in the presence and absence of lead-stress under laboratory conditions and its impact on plant growth and biochemical parameters of Zea mays were analysed.

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Marker-trait association study for root-related traits in chickpea (Cicer arietinum L.)

Acta agriculturae Slovenica ◽

10.14720/aas.2021.117.1.2167 ◽

2021 ◽

Vol 117 (3) ◽

pp. 1

Author(s):

Zahra SHEKARI ◽

Zahra TAHMASEBI ◽

Homayoun KANOUNI ◽

Ali ashraf MEHRABI

Keyword(s):

Cicer Arietinum ◽

Ssr Markers ◽

Agronomic Traits ◽

Nutrient Deficiency ◽

Root Traits ◽

Root Structure ◽

Structure Modification ◽

Linkage Groups ◽

Research Findings ◽

Simple Sequence

Root structure modification can improve important agronomic traits including yield, drought tolerance and nutrient deficiency resistance. The aim of the present study was to investigate the diversity of root traits and to find simple sequence repeat (SSR) markers linked to root traits in chickpea (Cicer arietinum L.). This research was performed using 39 diverse accessions of chickpea. The results showed that there is significant variation in root traits among chickpea genotypes. A total of 26 alleles were detected 26 polymorphic bands were produced by 10 SSR markers in the eight linkage groups (LG). The results indicated that there is substantial variability present in chickpea germplasm for root traits. By analyzing the population structure, four subpopulations were identified. PsAS2, AF016458, 16549 and 19075 SSR markers on LG1, LG3, LG2 and LG1 linkage group respectively were associated with root traits. The research findings provide valuable information for improving root traits for chickpea breeders.

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Análisis microscópico y observaciones histoquímicas de la raíz medicinal de Iostephane heterophylla (Cav.) Benth. Ex Hemsl. (Asteraceae)

Botanical Sciences ◽

10.17129/botsci.1714 ◽

2017 ◽

pp. 65

Author(s):

Estela Sandoval ◽

Robert A. Bye ◽

Griselda Ríos ◽

María Isabel Aguilar

Keyword(s):

Medicinal Plants ◽

Comparative Study ◽

Herbal Product ◽

Raw Material ◽

Herbal Drug ◽

Root Structure ◽

Fast Green ◽

Histological Techniques ◽

Original Contribution ◽

Phytochemical Studies

The roots of Iostephane heterophylla are popular in Mexican traditional medicine and as such are a good candidate to develop herbal drug preparations to be used as phytomedicine. International criteria for validation and standardization of a herbal product as phytomedicine include, among others, the integration of microscopic and histochemical characteristics of the raw material, as in this case the herbal drug, to guarantee its authenticity. As an original contribution to the knowledge of the root structure of this species, fresh roots fixed in FAA, were processed with conventional histological techniques (paraffin embedment and subsequent transversal and longitudinal sections that were stained with safranin-fast green) and stained with histochemical markers for identification of cellular contents. The root description includes dermic, fundamental and vascular tissues as well as cellular contents (proteins, polysaccharides, polyphenols, condensed and hydrolyzed tannins, starches and lipids, some of which have been isolated in previous phytochemical studies). These characteristics are compared to those of other species of Asteraceae as an initial comparative study to contribute to identify medicinal plants based upon their underground parts.

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Ekosistem Mangrove Binuangeun, Banten: Kondisi Fisik Dan Kimia Serta Ragam Ikan

Risenologi : Jurnal Sains, Teknologi, Sosial, Pendidikan, dan Bahasa ◽

10.47028/j.risenologi.2020.52.109 ◽

2020 ◽

Vol 5 (2) ◽

pp. 32-40

Author(s):

Fitri Andriyani

Keyword(s):

Research Method ◽

Mangrove Ecosystem ◽

Water Current ◽

Root Structure ◽

Chemical Condition ◽

Literature Study ◽

Marine Animals ◽

Mangrove Ecosystems ◽

Chemical Conditions ◽

Physical And Chemical

Binuangeun Mangrove Ecosystem is located in the south western Java Island, in the area of Lebak Regency, Banten Province. Mangrove ecosystems are ecosystems that located at the Coastal areas which are a habitat for a variety of marine animals which are associated with it, mostly fish, because of its complex or a very effective root structure which can provide a place for fish to be able to live, take shelter, develop, breed and also look for food. This research was conducted to determine the physical and chemical condition and the variety of fishes which found in the Binuangeu, Banten Mangrove Ecosystem. This research method uses literature study. Physical and chemical conditions of the Binuangeun Mangrove Ecosystem, Banten have degrees of temperature ranging from 28.20 - 32.20; acidity range between 7.00 - 8.09; turbidity ranges from 22.50 - 76.00 NTU; water current ranged from 0.079 to 0.189; phosphate content ranges from 0.02 - 0.008; salinity ranges from 30-35 PSU; and dissolved oxygen content ranges from 5.67 - 8.70. The types of fish found in the Binuangeun Mangrove Ecosystem, Banten are 45 species from 22 Family. The most abundant and relatively high species of existence is the Gobiidae with 10 species. Keywords: Banten, Binuangeun, Ecosystems, Fish, Mangroves

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