Influence of Potassium Deficiency on Photosynthesis, Chlorophyll Content, and Chloroplast Ultrastructure of Cotton Plants

  title={Influence of Potassium Deficiency on Photosynthesis, Chlorophyll Content, and Chloroplast Ultrastructure of Cotton Plants},
  author={Duli Zhao and Derrick M. Oosterhuis and Craig W. Bednarz},
In cotton (Gossypium hirsutum L.) grown in controlled-environment growth chamber the effects of K deficiency during floral bud development on leaf photosynthesis, contents of chlorophyll (Chl) and nonstructural saccharides, leaf anatomy, chloroplast ultrastructure, and plant dry matter accumulation were studied. After cotton plants received 35-d K-free nutrient solution at the early square stage, net photosynthetic rate (PN) of the uppermost fully expanded main-stem leaves was only 23 % of the… 

How potassium deficiency alters flower bud retention on cotton (Gossypium hirsutum L.)

Potassium deficiency during cotton’s early reproductive stage on carbohydrate content and metabolism, total antioxidant capacity and oxidative damage of cotton flower buds as well as the physiology of the leaf, subtending to the flower buds, resulted in significant decreases in flower bud retention.

Gaseous exchanges, growth and foliar anatomy of sugarcane plants grown in potassium (K) deprived nutrient solution

Sugarcane in the absence of K showed reduced growth due to the influence of this nutrient on gaseous exchanges and alterations in leaf anatomy, suggesting greater focus should be taken on potassium nutrition, mainly in physiological terms, since there are vast agricultural areas with potassium deficiency around the world.

The photosynthetic and structural differences between leaves and siliques of Brassica napus exposed to potassium deficiency

Siliques had substantially smaller A than leaves, which was attributed to less efficient functioning of the photosynthetic apparatus, especially the integrated limitations of biochemical processes (Jmax and Vcmax) and α; however, siliques were slightly less sensitive to K deficiency.

On Potassium Deficiency in Cotton - Disorder, Cause and Tissue Diagnosis

Canopy photosynthesis reduction in K-deficient plants is mainly attributed to both inhibited single leaf Pn rate and decreased leaf area index, and potassium concentrations in both blade and petiole of top fully expanded leaves on main stem are good indicators of K deficiency.


The enhanced biomass accumulation of cotton genotypes under K deficiency stress is related to their efficient photosynthetic apparatus and root system, appeared to be the most important morphological markers while breeding for K-use efficient cotton genotype.

Effects of Different Potassium Stress on Leaf Photosynthesis and Chlorophyll Fluorescence in Maize ( Zea Mays L.) at Seedling Stage

Results indicated that the inbred line 099 tolerance to K deficiency could keep chlorophyll content to maintain photosynthesis and to alleviate the injury of PSII under K deficiency condition.

Anatomical variation of mesophyll conductance under potassium deficiency has a vital role in determining leaf photosynthesis.

The results emphasize the important role of K on the regulation of gm by enhancing Sc /S and reducing cytoplasm resistance in leaves exposed to potassium (K) deficiency.



Biochemical basis for effects of k-deficiency on assimilate export rate and accumulation of soluble sugars in soybean leaves.

  • S. Huber
  • Chemistry, Medicine
    Plant physiology
  • 1984
It is concluded that decreased rates of assimilate export are associated with decreased activities of sucrose phosphate synthase, a key enzyme involved in sucrose formation, and that accumulation of hexose sugars may occur because of increased hydrolysis of Sucrose in K-deficient leaves.

The Ultrastructure of Chloroplasts in Mineral-deficient Maize Leaves.

The ultrastructure of mesophyll chloroplasts in full-nutrient and mineral-deficient maize (Zea mays) leaves was examined by electron microscopy after glutaraldehyde-osmium tetroxide fixation and morphological changes were correlated with functional alterations in the chloroplast as measured by photosystem I and II activities.

Effects of phosphorus deficiency on the photosynthesis and respiration of leaves of sugar beet.

CO(2) and water vapor exchange rates of individual attached leaves were determined at intervals after P cutoff and leaf phosphorus concentrations decreased, and leaf diffusion resistance was increased greatly by low P at low but not at high irradiance, r(l)' for plants at low P reaching values as high as 9 sec cm(-1).

Role of Potassium in Carbon Dioxide Assimilation in Medicago sativa L.

The specific activity of RuBPc isolated from severely K-deficient and K-sufficient leaflets was not significantly different, suggesting that K does not function inRuBPc activity, and the K-stimulated synthesis of Ru BPc most likely represents de novo synthesis.

Partitioning of potassium in the cotton plant during the development of a potassium deficiency

Visual potassium (K) deficiency symptoms of modern cotton (Gossypium hirsutum L.) cultivars are similar to classical descriptions, however, they occur first at the top of these more heavily fruiting cultivars and progress from younger to older leaves.

Interaction between K‐Deficiency and Light in 14C‐Sucrose Translocation in Bean Plants

All results reported here can be explained on the basis of a scheme whereby K plays a role in reversible intermediate steps between sugar formation in the chloroplast and the entry of this photosynthesised sugar into the “translocation pool” where it mixes with exogenous sugar.


The net rate of CO(2) uptake for leaves of Gossypium hirsutum L. was reduced when the plants were grown at low concentrations of NO(3) (-), PO(4) (2-), or K(+), indicating little effect on stomatal response.

Enhanced Photosynthesis and Stomatal Conductance of Pima Cotton (Gossypium barbadense L.) Bred for Increased Yield.

Breeding for increasing yield has enhanced the photosynthetic capacity and stomatal conductance of Pima cotton and altered the diurnal regulation of photosynthesis.

Potassium Nutrition Effects on Lint Yield and Fiber Quality of Acala Cotton

It is concluded that K supply to cotton fruit is an important determinant of fiber quality under field conditions, and that the K requirement for producing high lint yield with acceptable quality may differ among genotypes.