Exogenous application of EE-GRSP and changes in citrus rhizosphere properties
Mycorrhization-induced secretion of glomalin-related soil protein (GRSP) is known to contribute in improving soil fertility and aggregate stability. But, there is hardly any evidence that exogenous GRSP could produce the similar type of response. The present study was, therefore, carried out to ext...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Indian Council of Agricultural Research
2015-06-01
|
| Series: | The Indian Journal of Agricultural Sciences |
| Subjects: | |
| Online Access: | https://epubs.icar.org.in/index.php/IJAgS/article/view/49233 |
| _version_ | 1828717884519481344 |
|---|---|
| author | QIANG-SHENG WU A K SRIVASTAVA SHUANG WANG JIA-XIN ZENG |
| author_facet | QIANG-SHENG WU A K SRIVASTAVA SHUANG WANG JIA-XIN ZENG |
| author_sort | QIANG-SHENG WU |
| collection | DOAJ |
| description |
Mycorrhization-induced secretion of glomalin-related soil protein (GRSP) is known to contribute in improving soil fertility and aggregate stability. But, there is hardly any evidence that exogenous GRSP could produce the similar type of response. The present study was, therefore, carried out to extract easily extractable GRSP (EE-GRSP) from citrus rhizosphere soils and evaluate the response at 1/4, 1/2 and full strength EE-GRSP solutions watered into the rhizosphere of 27-year-old Satsuma mandarin (Citrus unshiu) grafted on the rootstock of Poncirus trifoliata. After ~5 months, exogenous EE-GRSP treatments produced significantly positive responses on endogenous EE-GRSP, difficultly-extractable GRSP (DE-GRSP), total GRSP production and soil organic carbon (SOC) content. A significantly positive correlation of these endogenous GRSP fractions with SOC indicated an active participation of GRSP on soil C pool. Exogenous GRSP showed a key role in binding water-stable aggregate (WSA) at 2–4, 1–2, 0.5–1, and 0.25– 0.5 mm size and enhancing WSA stability through changes in mean weight diameter (MWD). A stronger correlation of EE-GRSP and total GRSP with MWD was observed than DE-GRSP fraction. On the other hand, exogenous EEGRSP showed a positive effect on soil phosphatase activity, and soil endogenous EE-GRSP was significantly and positively correlated only with neutral phosphatase. Our studies suggest that exogenous EE-GRSP could be used as an effective regulator to affect soil fertility and soil structure within citrus rhizosphere.
|
| first_indexed | 2024-03-12T14:34:53Z |
| format | Article |
| id | doaj.art-084ff82640f04e4cbc154c282edc567e |
| institution | Directory Open Access Journal |
| issn | 0019-5022 2394-3319 |
| language | English |
| last_indexed | 2024-03-12T14:34:53Z |
| publishDate | 2015-06-01 |
| publisher | Indian Council of Agricultural Research |
| record_format | Article |
| series | The Indian Journal of Agricultural Sciences |
| spelling | doaj.art-084ff82640f04e4cbc154c282edc567e2023-08-17T09:17:35ZengIndian Council of Agricultural ResearchThe Indian Journal of Agricultural Sciences0019-50222394-33192015-06-0185610.56093/ijas.v85i6.49233Exogenous application of EE-GRSP and changes in citrus rhizosphere propertiesQIANG-SHENG WU0A K SRIVASTAVA1SHUANG WANG2JIA-XIN ZENG3Professor, College of Horticulture and Gardening/Institute of Root Biology, Yangtze University, Jingzhou, Hubei 434 025, ChinaPrincipal Scientist, Soil Science, Central Citrus Research Institute, Nagpur, Maharashtra 440 010College of Horticulture and Gardening/Institute of Root Biology, Yangtze University, Jingzhou, Hubei 434025, ChinaCollege of Horticulture and Gardening/Institute of Root Biology, Yangtze University, Jingzhou, Hubei 434025, China Mycorrhization-induced secretion of glomalin-related soil protein (GRSP) is known to contribute in improving soil fertility and aggregate stability. But, there is hardly any evidence that exogenous GRSP could produce the similar type of response. The present study was, therefore, carried out to extract easily extractable GRSP (EE-GRSP) from citrus rhizosphere soils and evaluate the response at 1/4, 1/2 and full strength EE-GRSP solutions watered into the rhizosphere of 27-year-old Satsuma mandarin (Citrus unshiu) grafted on the rootstock of Poncirus trifoliata. After ~5 months, exogenous EE-GRSP treatments produced significantly positive responses on endogenous EE-GRSP, difficultly-extractable GRSP (DE-GRSP), total GRSP production and soil organic carbon (SOC) content. A significantly positive correlation of these endogenous GRSP fractions with SOC indicated an active participation of GRSP on soil C pool. Exogenous GRSP showed a key role in binding water-stable aggregate (WSA) at 2–4, 1–2, 0.5–1, and 0.25– 0.5 mm size and enhancing WSA stability through changes in mean weight diameter (MWD). A stronger correlation of EE-GRSP and total GRSP with MWD was observed than DE-GRSP fraction. On the other hand, exogenous EEGRSP showed a positive effect on soil phosphatase activity, and soil endogenous EE-GRSP was significantly and positively correlated only with neutral phosphatase. Our studies suggest that exogenous EE-GRSP could be used as an effective regulator to affect soil fertility and soil structure within citrus rhizosphere. https://epubs.icar.org.in/index.php/IJAgS/article/view/49233Aggregate stabilityCarbonGlomalinWater-stable aggregate |
| spellingShingle | QIANG-SHENG WU A K SRIVASTAVA SHUANG WANG JIA-XIN ZENG Exogenous application of EE-GRSP and changes in citrus rhizosphere properties The Indian Journal of Agricultural Sciences Aggregate stability Carbon Glomalin Water-stable aggregate |
| title | Exogenous application of EE-GRSP and changes in citrus rhizosphere properties |
| title_full | Exogenous application of EE-GRSP and changes in citrus rhizosphere properties |
| title_fullStr | Exogenous application of EE-GRSP and changes in citrus rhizosphere properties |
| title_full_unstemmed | Exogenous application of EE-GRSP and changes in citrus rhizosphere properties |
| title_short | Exogenous application of EE-GRSP and changes in citrus rhizosphere properties |
| title_sort | exogenous application of ee grsp and changes in citrus rhizosphere properties |
| topic | Aggregate stability Carbon Glomalin Water-stable aggregate |
| url | https://epubs.icar.org.in/index.php/IJAgS/article/view/49233 |
| work_keys_str_mv | AT qiangshengwu exogenousapplicationofeegrspandchangesincitrusrhizosphereproperties AT aksrivastava exogenousapplicationofeegrspandchangesincitrusrhizosphereproperties AT shuangwang exogenousapplicationofeegrspandchangesincitrusrhizosphereproperties AT jiaxinzeng exogenousapplicationofeegrspandchangesincitrusrhizosphereproperties |