Abstract
ABSTRACT Plant growth-promoting bacteria (PGPB) are found in plant tissues and promote plant growth by secretion of hormones and enzymes, or by facilitating the nutrient uptake. This study assessed forty PGPB isolates to determine their effects on maize and sorghum growth. These isolates were also compared with uninoculated plants, as negative (-N; without N fertilization) and positive (+N; with N fertilization) controls. Plant height, stem diameter, shoot and root dry mass, leaf N accumulation and chlorophyll content were evaluated. For both the maize and sorghum, the height, stem diameter and shoot dry mass in plants inoculated with PGPB were similar to those of uninoculated plants supplied with N, and the responses for root mass were higher than in plants supplied with N. However, the PGPB isolates did not promote N accumulation and chlorophyll content similar to those of uninoculated plants supplied with N. The IPACC26 and IPACC30 isolates, both identified as Bacillus subtilis, resulted in better responses for plant growth and N accumulation than the other isolates.
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Claims 8
Claim · model-written summary
Inoculated maize height, stem diameter and shoot dry mass were similar to nitrogen-fertilized uninoculated plants.
- Treatment
- inoculated with PGPBe0
- Outcome
- height, stem diameter and shoot dry masse0
- Direction
- similare0
- Comparator
- uninoculated plants supplied with Ne0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both the maize and sorghum, the height, stem diameter and shoot dry mass in plants inoculated with PGPB were similar to those of uninoculated plants supplied with N”
Claim · model-written summary
Inoculated sorghum height, stem diameter and shoot dry mass were similar to nitrogen-fertilized uninoculated plants.
- Treatment
- inoculated with PGPBe0
- Outcome
- height, stem diameter and shoot dry masse0
- Direction
- similare0
- Comparator
- uninoculated plants supplied with Ne0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both the maize and sorghum, the height, stem diameter and shoot dry mass in plants inoculated with PGPB were similar to those of uninoculated plants supplied with N”
Claim · model-written summary
Inoculated maize root mass exceeded nitrogen-fertilized uninoculated plants.
- Treatment
- inoculated with PGPBe0
- Outcome
- root masse0
- Direction
- highere0
- Comparator
- plants supplied with Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both the maize and sorghum, the height, stem diameter and shoot dry mass in plants inoculated with PGPB were similar to those of uninoculated plants supplied with N, and the responses for root mass were higher than in plants supplied with N”
Claim · model-written summary
Inoculated sorghum root mass exceeded nitrogen-fertilized plants.
- Treatment
- inoculated with PGPBe0
- Outcome
- root masse0
- Direction
- highere0
- Comparator
- plants supplied with Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both the maize and sorghum, the height, stem diameter and shoot dry mass in plants inoculated with PGPB were similar to those of uninoculated plants supplied with N, and the responses for root mass were higher than in plants supplied with N”
Claim · model-written summary
PGPB did not produce nitrogen accumulation and chlorophyll content comparable to nitrogen-fertilized plants.
- Treatment
- PGPB isolatese0
- Outcome
- N accumulation and chlorophyll contente0
- Direction
- did not promotee0
- Comparator
- uninoculated plants supplied with Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the PGPB isolates did not promote N accumulation and chlorophyll content similar to those of uninoculated plants supplied with N”
t0“maize and sorghum”
Claim · model-written summary
PGPB did not produce nitrogen accumulation and chlorophyll content comparable to nitrogen-fertilized sorghum.
- Treatment
- PGPB isolatese0
- Outcome
- N accumulation and chlorophyll contente0
- Direction
- did not promotee0
- Comparator
- uninoculated plants supplied with Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the PGPB isolates did not promote N accumulation and chlorophyll content similar to those of uninoculated plants supplied with N”
t0“maize and sorghum”
Claim · model-written summary
IPACC26 produced better growth and nitrogen accumulation responses than other isolates.
- Treatment
- IPACC26e0
- Interactor
- Bacillus subtilis
Bacillus subtilise0symbiont - Outcome
- plant growth and N accumulatione0
- Direction
- bettere0
- Comparator
- other isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The IPACC26 and IPACC30 isolates, both identified as Bacillus subtilis, resulted in better responses for plant growth and N accumulation than the other isolates”
t0“maize and sorghum”
Claim · model-written summary
IPACC30 produced better growth and nitrogen accumulation responses than other isolates.
- Treatment
- IPACC30e0
- Interactor
- Bacillus subtilisBacillus subtilise0symbiont
- Outcome
- plant growth and N accumulatione0
- Direction
- bettere0
- Comparator
- other isolatese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The IPACC26 and IPACC30 isolates, both identified as Bacillus subtilis, resulted in better responses for plant growth and N accumulation than the other isolates”
t0“maize and sorghum”
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