Does plant root architecture respond to potassium nutrition under water stress? A case from rice seedling root responses

ABSTRACTThe root is the sensing organ for potassium (K) and water availability. We evaluated whether K availability influences root architecture and contributes to drought tolerance under moisture stress. Rice seedling growth was severely affected by low K availability under water stress, and the substantial reductions in root projected area, maximum width, and width to depth ratio were observed. High K availability helps maintain root top and bottom angles and reduces root steepness under mild water stress, but over K nutrition does not ensure higher seedling growth. Under severe water stress, the steepness was more regulated by water than K availability.

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Does Plant Root Architecture Respond to Potassium Under Water Stress? A Case from Rice Seedling Root Responses

Current Science ◽

10.18520/cs/v120/i6/1050-1056 ◽

2021 ◽

Vol 120 (6) ◽

pp. 1050

Author(s):

Dipika S. Patel ◽

Bardhan Kirti ◽

P. Patel Dhiraji ◽

Parekh Vipulkumar ◽

Jena Suchismita ◽

...

Keyword(s):

Water Stress ◽

Root Architecture ◽

Plant Root ◽

Rice Seedling ◽

Seedling Root ◽

Root Responses

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The effects of soil moisture stress on the growth of barley. II. Grain growth

Australian Journal of Agricultural Research ◽

10.1071/ar9650265 ◽

1965 ◽

Vol 16 (3) ◽

pp. 265 ◽

Cited By ~ 27

Author(s):

D Aspinall

Keyword(s):

Water Stress ◽

Grain Growth ◽

Indirect Evidence ◽

Dry Weight ◽

Moisture Stress ◽

Grain Development ◽

Grain Moisture ◽

Severe Water Stress ◽

Influence Of Water ◽

Major Period

The influence of water stress on grain growth has been investigated under conditions of intermittent stress with pot-grown plants and under longer periods of stress with plants grown in lysimeters. Premature cessation of growth was induced by even a moderate water stress, but the rate of grain growth (in dry weight) in the early stages of development was reduced only by severe water stress. There was evidence for an actual loss of dry matter in the final stages of maturation where plants were subjected to severe water stress. Grain moisture content was relatively unaffected by water stress during the major period of grain development, although grain water content dropped with increasing water stress during ripening. Spikelet chlorophyll content was also reduced by water stress, particularly in the later stages of grain development. Indirect evidence indicated that translocation of assimilate from the leaves to the ear was reduced by a moderate water stress. Tne significance of these findings in elucidating the mechanism of action of water stress on grain growth is discussed.

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Revealing the Effects of Potassium on Rice Roots under Moisture Stress

10.24047/bc102428 ◽

2018 ◽

Vol 102 (4) ◽

pp. 28-31

Author(s):

Kirti Bardhan ◽

Dipika Patel ◽

Dhiraji Patel

Keyword(s):

Drought Stress ◽

Drought Tolerance ◽

Root Architecture ◽

Plant Root ◽

Moisture Stress ◽

Rice Roots ◽

Aerial Parts ◽

Organ Level ◽

Plant Root System

The role of K in providing drought tolerance in the aerial parts of plants at the cellular, molecular, tissue, and organ level is well established compared to the plant root system. However, it is known that plants acquire soil water from deeper layers by modifying root architecture. The current study investigated the role of K in changing root architecture to facilitate more water acquisition as a mechanism to mitigate drought stress.

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Electron Probe Analysis of Vertebrate Smooth Muscle: Distribution of Ca and Ci

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100091652 ◽

1976 ◽

Vol 34 ◽

pp. 334-335 ◽

Cited By ~ 1

Author(s):

Avril V. Somlyo ◽

H. Shuman ◽

A.P. Somlyo

Keyword(s):

Smooth Muscle ◽

Electron Probe ◽

Preliminary Report ◽

Cell Damage ◽

Electron Probe Analysis ◽

Perinuclear Space ◽

Probe Analysis ◽

High K ◽

Low K ◽

Initial Results

This is a preliminary report of electron probe analysis of rabbit portal-anterior mesenteric vein (PAMV) smooth muscle cryosectioned without fixation or cryoprotection. The instrumentation and method of electron probe quantitation used (1) and our initial results with cardiac (2) and skeletal (3) muscle have been presented elsewhere.In preparations depolarized with high K (K2SO4) solution, significant calcium peaks were detected over the sarcoplasmic reticulum (Fig 1 and 2) and the continuous perinuclear space. In some of the fibers there were also significant (up to 200 mM/kg dry wt) calcium peaks over the mitochondria. However, in smooth muscle that was not depolarized, high mitochondrial Ca was found in fibers that also contained elevated Na and low K (Fig 3). Therefore, the possibility that these Ca-loaded mitochondria are indicative of cell damage remains to be ruled out.

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Plasma surface interactions in nanoscale processing: Preservation of low-k integrity and high-k gate-stack etching with Si selectivity

10.31274/etd-180810-312 ◽

2012 ◽

Author(s):

Juline Shoeb

Keyword(s):

Surface Interactions ◽

Gate Stack ◽

Plasma Surface ◽

Plasma Surface Interactions ◽

High K ◽

Low K

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High throughput phenotyping of root growth dynamics, lateral root formation, root architecture and root hair development enabled by PlaRoM

Functional Plant Biology ◽

10.1071/fp09167 ◽

2009 ◽

Vol 36 (11) ◽

pp. 938 ◽

Cited By ~ 48

Author(s):

Nima Yazdanbakhsh ◽

Joachim Fisahn

Keyword(s):

Root Growth ◽

Growth Kinetics ◽

Lateral Root ◽

Root Architecture ◽

Imaging Techniques ◽

Plant Root ◽

Primary Root ◽

Growth Media ◽

Root Extension ◽

Lateral Root Development

Plant organ phenotyping by non-invasive video imaging techniques provides a powerful tool to assess physiological traits and biomass production. We describe here a range of applications of a recently developed plant root monitoring platform (PlaRoM). PlaRoM consists of an imaging platform and a root extension profiling software application. This platform has been developed for multi parallel recordings of root growth phenotypes of up to 50 individual seedlings over several days, with high spatial and temporal resolution. PlaRoM can investigate root extension profiles of different genotypes in various growth conditions (e.g. light protocol, temperature, growth media). In particular, we present primary root growth kinetics that was collected over several days. Furthermore, addition of 0.01% sucrose to the growth medium provided sufficient carbohydrates to maintain reduced growth rates in extended nights. Further analysis of records obtained from the imaging platform revealed that lateral root development exhibits similar growth kinetics to the primary root, but that root hairs develop in a faster rate. The compatibility of PlaRoM with currently accessible software packages for studying root architecture will be discussed. We are aiming for a global application of our collected root images to analytical tools provided in remote locations.

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Physiological and Yield Responses of Green-Shelled Beans (Phaseolus vulgaris L.) Grown under Restricted Irrigation

Agronomy ◽

10.3390/agronomy11030562 ◽

2021 ◽

Vol 11 (3) ◽

pp. 562

Author(s):

Karen Campos ◽

Andrés R. Schwember ◽

Daniel Machado ◽

Mónica Ozores-Hampton ◽

Pilar M. Gil

Keyword(s):

Water Stress ◽

Deficit Irrigation ◽

Pot Experiment ◽

Water Restriction ◽

One Pot ◽

Dry Land ◽

Severe Water Stress ◽

The Face ◽

Use Efficiency ◽

Yield Responses

Common bean is an important crop, consumed as green-shelled bean in several countries. In Chile, green-shelled beans are cultivated often as a dry land crop, vulnerable to drought. The objective of this study was to characterize the hydric and productive responses of four green-shelled bean genotypes subjected to deficit irrigation in order to outline production strategies in the face of increasing water scarcity. Two experiments were evaluated: one pot experiment with three irrigation treatments, supplying 100% of the crop evapotranspiration (ETc) (T100), 50% (T50), and 30% (T30); and an open field experiment with two treatments: 100% (I100) and 40% of ETc (I40). Treatments were applied during reproductive stage in determinate cultivars and vegetative stage in indeterminate plants. Severe water restriction (T30 and I40) in both experiments showed a significant decrease in stomatal conductances, as well as biomass and number of grains per pod; I40 treatment also showed a reduction in chlorophyll fluorescence. Water use efficiency (WUE) was higher under water stress in field (I40), but lower on the T30 treatment from the pot experiment. Determinate cultivars showed 22.7% higher of 100-seed weight compared to indeterminate type, and, thus, higher tolerance to drought. Our results indicate that severe water stress is highly harmful in terms of yield, and a moderate controlled deficit irrigation plus the use of determinate genotypes may be a strategy for producing green-shelled bean successfully under a drought scenario.

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Change of Ascorbic Acid Level after Grafting of Tomato Seedlings

Zeitschrift für Naturforschung C ◽

10.1515/znc-1999-9-1032 ◽

1999 ◽

Vol 54 (9-10) ◽

pp. 830-833 ◽

Cited By ~ 9

Author(s):

Akira Wadano ◽

Mitsuharu Azeta ◽

Shin-ichi Itotani ◽

Ai Kanda ◽

Toshio Iwaki ◽

...

Keyword(s):

Ascorbic Acid ◽

Water Stress ◽

Ascorbate Peroxidase ◽

Phosphate Buffer ◽

Acid Level ◽

Active Oxygen ◽

Ascorbic Acid Level ◽

Electrochemical Detector ◽

Tomato Seedlings ◽

Severe Water Stress

Grafting is an easy way to produce a new seedling, which can tolerate against various stresses. During the acclimation after grafting, however, the seedlings still suffer a severe water stress. It is well known that water stress produces active oxygen to oxidize ascorbic acid. The concentration of ascorbic acid in the leaves was analyzed by HPLC equipped with an electrochemical detector. The column used was SP-120-5-ODS-BP (DAISO, JAPAN) and elution was performed with 0.1 ᴍ phosphate buffer, pH 3.0. After grafting the seedlings were acclimated under a 6-hr light/dark regimen. The content of ascorbic acid increased gradually during 2 days compared with control. The ascorbate peroxidase showed about constant activity, so the increase of ascorbic acid may be due to its requirement to cure the grafting

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RESPONSE OF PEAS TO ENVIRONMENT: IV. EFFECT OF FIVE SOIL WATER REGIMES ON GROWTH AND DEVELOPMENT OF PEAS

Canadian Journal of Plant Science ◽

10.4141/cjps68-025 ◽

1968 ◽

Vol 48 (2) ◽

pp. 129-137 ◽

Cited By ~ 14

Author(s):

A. R. Maurer ◽

H. F. Fletcher ◽

D. P. Ormrod

Keyword(s):

Water Stress ◽

Soil Water ◽

Growth And Development ◽

Dry Matter ◽

Fresh Weight ◽

Water Regimes ◽

Severe Water Stress ◽

Water Conditions ◽

Before And After ◽

Soil Water Conditions

Pea plants growing in "weighing lysimeters" were subjected to five soil-water regimes to determine their response to varying conditions of soil water imposed at different stages of development. Plants subjected to a minimal water stress developed luxuriantly and continued to grow up to the harvest period. Pea yield and plant height were not reduced, but fresh weight and dry matter were less if irrigation was applied when soil water fell to 60% rather than 88% of that available. A severe water stress after blossom reduced pea yield, irrespective of soil-water conditions prior to blossom. Plants which had been given ample soil water before blossom wilted visibly when a severe stress was imposed in the post-blossom period, yet wilting did not occur in plants subjected to severe water stress both before and after blossom. Severe water stress prior to blossom did not cause a decrease in pea yield if ample soil moisture was made available after blossom.

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