Abstract
Leaf early senescence caused by nutrition deficiency is one of the major limitation reasons in the world crop production. Potassium (K) is one of important nutrient elements in crop growth, which modifies dozens of enzyme activations and controls stomatal movement of photosynthesis. The yield and quality of maize (Zea Mays L.) have been limited due to K deficiency in plough layer soil. However, the mechanism of K deficiency tolerance is not fully understood in maize. In this study, two inbred lines, 099 (tolerance to potassium deficiency) and 835 (sensitive to potassium deficiency) were carried out to investigate the variations of chlorophyll content, photosynthetic and chlorophyll fluorescence parameters related with senescence under different K+ concentrations in maize at seedling stage. The results showed that the Chlorophyll a, b and (a + b) of 835 were significantly decreased under different K deficiency treatments, whereas those of 099 were remained normal. In addition, 099 showed a lower stomatal restriction and higher electronic transition capacity under different K deficiency treatments. The variations of F0, Fv/Fm, ΦPSⅡ, qP and NPQ in 835 were largely higher than those in 099. These 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. This study should contribute to explaining the physiological mechanism tolerance nutrition deficiency and improving breeding program in maize.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Potassium deficiency significantly reduced chlorophyll a, b and total chlorophyll in maize line 835.
- Material
- 835e0
- Organ / stage
- seedling stagee1
- Treatment
- different K deficiency treatmentse0
- Outcome
- Chlorophyll a, b and (a + b)e0
- Direction
- decreasede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the Chlorophyll a, b and (a + b) of 835 were significantly decreased under different K deficiency treatments”
e1“in maize at seedling stage”
Claim · model-written summary
Chlorophyll a, b and total chlorophyll in maize line 099 remained normal under potassium deficiency.
- Material
- 099e0
- Organ / stage
- seedling stagee2
- Treatment
- different K deficiency treatmentse1
- Outcome
- Chlorophyll a, b and (a + b)e1
- Direction
- remained normale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas those of 099 were remained normal”
e1“The results showed that the Chlorophyll a, b and (a + b) of 835 were significantly decreased under different K deficiency treatments”
e2“in maize at seedling stage”
Claim · model-written summary
Under potassium deficiency, line 099 showed lower stomatal restriction than the contrasting line.
- Material
- 099e0
- Treatment
- different K deficiency treatmentse0
- Outcome
- stomatal restrictione0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“099 showed a lower stomatal restriction and higher electronic transition capacity under different K deficiency treatments”
e1“in maize at seedling stage”
Claim · model-written summary
Under potassium deficiency, line 099 showed higher electronic transition capacity than the contrasting line.
- Material
- 099e0
- Treatment
- different K deficiency treatmentse0
- Outcome
- electronic transition capacitye0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“099 showed a lower stomatal restriction and higher electronic transition capacity under different K deficiency treatments”
e1“in maize at seedling stage”
Claim · model-written summary
Changes in F0, Fv/Fm and ΦPSⅡ under potassium deficiency were larger in line 835 than 099.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The variations of F0, Fv/Fm, ΦPSⅡ, qP and NPQ in 835 were largely higher than those in 099”
e1“in maize at seedling stage”
Claim · model-written summary
Changes in qP and NPQ under potassium deficiency were larger in line 835 than 099.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The variations of F0, Fv/Fm, ΦPSⅡ, qP and NPQ in 835 were largely higher than those in 099”
e1“in maize at seedling stage”
Claim · model-written summary
The authors interpreted line 099 potassium-deficiency tolerance as preserving chlorophyll, maintaining photosynthesis and alleviating PSII injury.
- Material
- 099e0
- Treatment
- K deficiencye0
- Outcome
- alleviate the injury of PSIIe0
- Qualifier
- keep chlorophyll content to maintain photosynthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“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”
e1“in maize at seedling stage”
The same questions in other papers
potassium · physiology: pigments · Zea mays (maize)Positive and negative results
19 papers in the same direction as this paper · 2 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- negative
- positive
18 papers more in this group
See all 22 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.