Abstract
Healthy seeds of different varieties of rice (PD 6, NDR 359, PD 16 and PS 5) and wheat (UP 262, UP 2628, PBW 175 and UP 2554) were germinated and fourteen days after germination, young rice/wheat seedlings were transferred to half strength of Hogland solution (pH 7.0) containing either recommended levels of Zn (0.05 mg Zn L-1) or no Zn for four days. For solidification of medium 0.4% w/v agar- agar was mixed in the Hogland solutions of both –Zn and +Zn. Prior to solidification, 11.25 mL of 0.1% bromothymol blue dye solution prepared in 60 % ethanol and was mixed to agar nutrient solution. Twenty five mL of nutrient agar medium with +Zn or –Zn was poured in glass petri plates of 10 cm diameter and one seedling of each rice/wheat variety from +Zn or –Zn lot was transferred to the respective nutrient agar medium in duplicate. The colour change near roots under +Zn and –Zn were monitored and photographs were taken after 48 hrs in case of rice and 72 hrs in case of wheat for recording the extent of change in colour of the nutrient medium in the rhizosphere of all the rice and wheat varieties. In rice NDR 359 substantially reduced the pH in vicinity of roots (more yellow area around roots) than in Zn sufficient medium indicating possibly a better activity of the proton efflux pump to enhance Zn uptake under Zn deficient conditions. In Zn deficient conditions, Zn inefficient genotype UP 262 failed to substantially reduce pH in the vicinity of roots (less yellow areas around the roots) however, this variety under Zn sufficient conditions could reduce the pH of the growth medium (more yellowing around the roots).
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Claims 3
Claim · model-written summary
Under Zn deficiency, rice NDR 359 substantially reduced the pH near its roots more than in Zn-sufficient medium.
- Taxon
- rice
Oryza sativae1 - Material
- NDR 359e1
- Organ / stage
- rootse1
- Treatment
- Zn deficient conditionse1
- Outcome
- pH in vicinity of rootse1
- Direction
- substantially reducede1
- Comparator
- Zn sufficient mediume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In rice NDR 359 substantially reduced the pH in vicinity of roots (more yellow area around roots) than in Zn sufficient medium indicating possibly a better activity of the proton efflux pump to enhance Zn uptake under Zn deficient conditions”
Claim · model-written summary
Under Zn deficiency, Zn-inefficient wheat genotype UP 262 failed to substantially reduce the pH near its roots.
- Taxon
- wheat
Triticum aestivumt0 - Material
- UP 262e2
- Organ / stage
- rootse2
- Treatment
- Zn deficient conditionse2
- Outcome
- pH in the vicinity of rootse2
- Direction
- failed to substantially reducee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Zn deficient conditions, Zn inefficient genotype UP 262 failed to substantially reduce pH in the vicinity of roots (less yellow areas around the roots)”
t0“Rice and Wheat Varieties”
Claim · model-written summary
Under Zn sufficiency, wheat genotype UP 262 could reduce the pH of the growth medium.
- Taxon
- wheatTriticum aestivumt0
- Material
- UP 262e2
- Treatment
- Zn sufficient conditionse3
- Outcome
- pH of the growth mediume3
- Direction
- could reducee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In Zn deficient conditions, Zn inefficient genotype UP 262 failed to substantially reduce pH in the vicinity of roots (less yellow areas around the roots)”
e3“this variety under Zn sufficient conditions could reduce the pH of the growth medium”
t0“Rice and Wheat Varieties”
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