Potassium deficiency affects water status and photosynthetic rate of the vegetative sink in green house tomato prior to its effects on source activity

Kanai, Synsuke; Moghaieb, Reda E. A.; El‐Shemy, Hany A.; Panigrahi, Rashmi; Mohapatra, Pravat K.; Ito, Junki; Nguyen, Nguyen T; Saneoka, Hirofumi; Fujita, Kazuo

doi:10.1016/j.plantsci.2010.10.011

Cited by 158 publications

(99 citation statements)

References 31 publications

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“…However, the transpiration rate and the photosynthetic activity showed the positive eff ect of the potassium supply and also the negative eff ect of nitrogen defi ciency. The results confi rmed and Kanai et al (2011) and Lei Ma et al (2011) (eff ect of potassium supply), and Ciompi et al (1996) and Doncheva et al (2001) (nitrogen defi ciency). Examined the nutrient content of the transplants, although in the previous 40 days before measuring the nutrient solution in the nitrogen defi ciency treatment did not contain any nitrogen, the plants could use the storage nitrogen from the substrate and some from the older plant parts.…”

Section: Discussionsupporting

confidence: 79%

“…At their trial (test plant: Stevia rebaudiana Bertoni), the favourable potassium supply improved photosynthesis rate and decreased the chlorophyll a/b ratio. As the observation of Kanai et al (2011), the potassium defi ciency stress decreased photosynthesis, expansion and transport of 14 C assimilates of the source leaf in case of greenhouse tomato plants. The potassium overdose resulted salt-damage symptoms, or the defi ciency of some antagonist element (Ma, Ca, B, Zn, Mn) (Terbe, 2011).…”

Section: Introductionmentioning

confidence: 79%

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Effect of Nutrient Supply on Some Selected Parameters of Sweet Pepper (Capsicum annuum L. cv. 'HRF') Transplants

Jezdinský

Pokluda

Slezák

2016

Acta Univ. Agric. Silvic. Mendelianae Brun.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 79%

Effect of Nutrient Supply on Some Selected Parameters of Sweet Pepper (Capsicum annuum L. cv. 'HRF') Transplants

Jezdinský

Pokluda

Slezák

2016

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…Globally, however, plant K uptake appears to be associated with water availability (Sardans et al, 2011(Sardans et al, , 2012aGe et al, 2012), wherein a lower K uptake in turn negatively affects water uptake by reducing the activity of aquaporins (Kanai et al, 2011). All these interconnected relationships strongly suggest a cascade of higher water deficit, lower K uptake and a reduced capacity to avoid drought, which could become a serious problem in currently dry areas that are threatened by future drier scenarios.…”

Section: K In a Drier Worldmentioning

confidence: 99%

Potassium: a neglected nutrient in global change

Sardans

Peñuelas

2015

Global Ecology and Biogeography

375

265

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Aim Potassium (K) is the second most abundant nutrient in plant photosynthetic tissues after nitrogen (N). Thousands of physiological and metabolic studies in recent decades have established the fundamental role of K in plant function, especially in water-use efficiency and economy, and yet macroecological studies have mostly overlooked this nutrient. MethodsWe have reviewed available studies on the content, stoichiometry and roles of K in the soil-plant system and in terrestrial ecosystems. We have also reviewed the impacts of global change drivers on K content, stoichiometry and roles. ConclusionsThe current literature indicates that K, at a global level, is as limiting as N and phosphorus (P) for plant productivity in terrestrial ecosystems. Some degree of K limitation has been seen in up to 70% of all studied terrestrial ecosystems. However, in some areas atmospheric K deposition from human activities is greater than that from natural sources. We are far from understanding the K fluxes between the atmosphere and land, and the role of anthropogenic activities in these fluxes. The increasing aridity expected in wide areas of the world makes K more critical through its role in water-use efficiency. N deposition exerts a strong impact on the ecosystem K cycle, decreasing K availability and increasing K limitation. Plant invasive success is enhanced by higher soil K availability, especially in environments without strong abiotic stresses. The impacts of other drivers of global change, such as increasing atmospheric CO2 or changes in land use, remain to be elucidated. Current models of the responses of ecosystems and carbon storage to projected global climatic and atmospheric changes are now starting to consider N and P, but they should also consider K, mostly in arid and semi-arid ecosystems.

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“…Potassium (K 2 O) is the nutrient most absorbed by tomato plants and is essential for many physiological processes, such as photosynthesis, enzymatic activation and synthesis of proteins (Kanai et al, 2011), as well as soluble solids (SS) and titratable acidity (TA) (Blanco & Folegatti, 2008).…”

Section: Introductionmentioning

confidence: 99%

Potassium fertilization via fertigation and conventional application on quality of tomato fruits

Neto

Azevedo

Viana

et al. 2016

Rev. bras. eng. agríc. ambient.

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The tomato crop plays an important environmental, economic and even social role, especially for creating employment and income. The present work aims to evaluate the effects of potassium (K) drip fertigation and of conventional K fertilization on the tomato crop quality. The experiment was conducted under field conditions, in the period between August 2011 and December 2011, in Fortaleza, CE, Brazil. The experimental design was in randomized blocks in a factorial arrangement and the treatments corresponded to doses (D1 = 200, D2 = 400 and D3 = 800 kg K2O ha-1) and K fertilizing methods (F1 - Fertigation and F2 - Conventional fertilization), plus an additional control (without K fertilization) for each fertilizing method, with four replicates. The following variables were analyzed: fruit firmness (FF), soluble solids content (SS), titratable acidity (TA), pH and SS/TA ratio. K fertilization through fertigation (400 kg K2O ha-1) increases SS and the SS/TA ratio of the tomato fruits. Thus, K fertigation is the most promising method, since it allows the use of a lower K dose.

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Potassium deficiency affects water status and photosynthetic rate of the vegetative sink in green house tomato prior to its effects on source activity

Cited by 158 publications

References 31 publications

Effect of Nutrient Supply on Some Selected Parameters of Sweet Pepper (Capsicum annuum L. cv. 'HRF') Transplants

Effect of Nutrient Supply on Some Selected Parameters of Sweet Pepper (Capsicum annuum L. cv. 'HRF') Transplants

Potassium: a neglected nutrient in global change

Potassium fertilization via fertigation and conventional application on quality of tomato fruits

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