Knockout of the guard cell K
            <sup>+</sup>
            out channel and stomatal movements

Schroeder, Julian I.

doi:10.1073/pnas.1031801100

Cited by 18 publications

(7 citation statements)

References 26 publications

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“…uptake by the guard cells in stomatal opening has been well documented, whereas the role of intracellular Mg ?? was found to be insignificant in stomatal opening (Schroeder 2003;Pandey et al 2007). The wide stomatal opening observed in the regenerated leaves of DF may be a consequence of such high level of K ?…”

Section: X-ray Microanalysis Of Guard Cellsmentioning

confidence: 92%

“…The influx and efflux of K ? ions in the guard cells may also affect the stomatal function (Schroeder 2003). Antioxidative enzyme activities, particularly that of superoxide dismutase (SOD), which catalyses the reduction of superoxide radical into H 2 O 2 and then subsequently to water, has been largely correlated to hyperhydricity as a measure of oxidative stress (Chen and Ziv 2004;Chakrabarty et al 2006;Dewir et al 2006).…”

Section: Introductionmentioning

confidence: 99%

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Shoot multiplication kinetics and hyperhydric status of regenerated shoots of gladiolus in agar-solidified and matrix-supported liquid cultures

Gupta

Prasad

2010

Plant Biotechnol Rep

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In vitro shoot regeneration of gladiolus in three different culture systems, viz., semi-solid agar (AS), membrane raft (MR), and duroplast foam liquid (DF) cultures was evaluated following the kinetics of shoot multiplication and hyperhydricity at optimized growth regulator combinations. Compared to the AS system, matrixsupported liquid cultures enhanced shoot multiplication. The peak of shoot multiplication rate was attained at 18 days of incubation in the MR and DF systems, whereas the maximum rate in the AS system was attained at 21 days. An early decline in acceleration trend was observed in liquid cultures than the AS culture. The hyperhydric status of the regenerated shoots in the different culture systems was assessed in terms of stomatal attributes and antioxidative status. Stomatal behavior appeared to be normal in the AS and MR systems. However, structural anomaly of stomata such as large, round shaped guard cells with damage in bordering regions of stomatal pores was pronounced in the DF system along with a relatively higher K ? ion concentration than in the AS and MR systems. Antioxidative status of regenerated shoots was comparable in the AS and MR systems, while a higher incidence of oxidative damages of lipid membrane as evidenced from malondialdehyde and ascorbate content was observed in the DF system. Higher oxidative stress in the DF system was also apparent by elevated activities of superoxide dismutase, ascorbate peroxidase, and catalase. Among the three culture systems, liquid culture with MR resulted in maximum shoot multiplication with little or no symptoms of hyperhydricity.Shoots in the DF system were more prone to hyperhydricity than those in the AS and MR systems. The use of matrix support such as membrane raft as an interface between liquid medium and propagating tissue could be an effective means for rapid and efficient mass propagation with little or no symptoms of hyperhydricity.

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Section: X-ray Microanalysis Of Guard Cellsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Shoot multiplication kinetics and hyperhydric status of regenerated shoots of gladiolus in agar-solidified and matrix-supported liquid cultures

Gupta

Prasad

2010

Plant Biotechnol Rep

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“…This trend suggests lenticel characteristics during the growing season may be related to the emergence of GS in 'WA 38' apples, perhaps induced by environmental or nutritional factors, or an interaction between them. The role of K and sucrose in osmotic regulation of stomatal guard cells has previously been studied [87][88][89] and may be possible area of investigation to help to explain the interaction between nutritional and environmental factors affecting GS development in 'WA 38' fruit.…”

Section: The Potential Role Of Lenticels and Cuticle Healthmentioning

confidence: 99%

Investigations of Multiple Approaches to Reduce Green Spot Incidence in ‘WA 38’ Apple

et al. 2022

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A pre-harvest apple (Malus × domestica Borkh.) disorder named “green spot” (GS) was recently identified on ‘WA 38’ apples. Previous work indicated a tentative association between GS and fruit mineral imbalance, and an influence of rootstock selection on GS frequency; however, the specific causes, risk factors, and mitigation steps have not been explored. In this study, the role of microclimate, modified using netting or fruit bagging, on GS incidence in ‘WA 38’ apples over two years on two different dwarfing rootstocks, ‘Geneva 41’ (‘G.41’) and ‘Malling 9-Nic29’ (‘M.9’), was investigated. Early season fruit bagging reduced GS appearance, but netting showed mixed results between year and rootstock. Rootstock selection influenced GS incidence, especially in the 2021 season. Fruit mineral analyses highlighted some differences of mineral composition between symptomatic and asymptomatic apples, which helped to corroborate earlier reports; however, within the full context of these results, it is not clear that nutrient imbalance directly influences disorder incidence. Further work to understand the mechanisms behind GS emergence should consider environmental factors, including light, humidity, and wind, as well as anatomical features of ‘WA 38’ fruit, such as lenticel morphology and physiology.

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“…In contrast to N and P, K does not bind covalently to organic molecules. However, it is the most abundant cellular cation, regulating stomatal movement, osmotic adjustment, charge balance, steady-state enzyme activation, membrane potential, and membrane protein transport (Schroeder 2003;Shabala 2003;Britto and Kronzucker 2008;Maathuis 2009;Blatt et al, 2014;Wang and Wu 2015). These results indicated that complex interactions among N, P, and K determine nutrient homeostasis and thus plant growth and development.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen, Phosphorus, and Potassium Influence Rice Growth and Development by Regulating the Efficiency of Energy Production

Chen

Jiao

et al. 2021

Preprint

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Background: Nitrogen (N), phosphorus (P), and potassium (K) are important essential nutrients for plant growth and development, but how they regulate plant energy status remains unclear. Results: In this study, we grew Nipponbare rice (Oryza sativa) seedlings in a growth chamber for 20 d at 30/24 ℃ (day/night) under natural sunlight conditions with different nutrient regimes. N appeared to play the most important role in plant growth and development, followed by P and K. The highest nonstructural carbohydrate (NSC) content, dry weight, net photosynthetic rate (PN), ATP content, and NADH dehydrogenase, cytochrome oxidase, and ATPase activities were found in the plants that received sufficient N, P, and K. The lowest values of these parameters were measured in the N-deficient plants. Higher dry matter accumulation was observed in the −K treatment than in the −P treatment, but there was no difference in the ratio of respiration rate to photosynthetic rate between these two treatments, suggesting that differences in energy production efficiency may have accounted for this result. This hypothesis was confirmed by higher ATP contents and activities of NADH dehydrogenase, cytochrome oxidase, and ATPase in the K-deficient plants than in the P-deficient plants. Conclusion: We inferred that N, P, and K controlled rice plant growth and development by regulating the efficiency of energy production.

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Knockout of the guard cell K ⁺ out channel and stomatal movements

Cited by 18 publications

References 26 publications

Shoot multiplication kinetics and hyperhydric status of regenerated shoots of gladiolus in agar-solidified and matrix-supported liquid cultures

Shoot multiplication kinetics and hyperhydric status of regenerated shoots of gladiolus in agar-solidified and matrix-supported liquid cultures

Investigations of Multiple Approaches to Reduce Green Spot Incidence in ‘WA 38’ Apple

Nitrogen, Phosphorus, and Potassium Influence Rice Growth and Development by Regulating the Efficiency of Energy Production

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Knockout of the guard cell K + out channel and stomatal movements

Cited by 18 publications

References 26 publications

Shoot multiplication kinetics and hyperhydric status of regenerated shoots of gladiolus in agar-solidified and matrix-supported liquid cultures

Shoot multiplication kinetics and hyperhydric status of regenerated shoots of gladiolus in agar-solidified and matrix-supported liquid cultures

Investigations of Multiple Approaches to Reduce Green Spot Incidence in ‘WA 38’ Apple

Nitrogen, Phosphorus, and Potassium Influence Rice Growth and Development by Regulating the Efficiency of Energy Production

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Product

Resources

About

Knockout of the guard cell K ⁺ out channel and stomatal movements