Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | Springer Nature Link |
|---|---|
| Author | Nikolaeva, M. K. Maevskaya, S. N. Voronin, P. Yu. |
| Copyright Year | 2015 |
| Abstract | The influence of progressive soil drought (5 and 7 days) on photosynthetic CO$_{2}$/H$_{2}$O gas exchange, activities of ascorbate peroxidase (AscP) and glutathione reductase (GR), the contents of ascorbate (Asc), glutathione, soluble carbohydrates, proline, chlorophyll, and malondialdehyde (MDA) was investigated on leaves of maize seedlings (Zea mays L., cv. Troinaya sladost). Watering of plants destined for drought treatment was stopped on the 8th day after shoot emergence. On the first stage of drought (5 days) the activities of AscP, GR and the content of Asc, glutathione, MDA, and chlorophyll in leaves of drought-treated plants did not exhibit appreciable changes. The first plant response to water shortage consisted in the increased content of reducing sugars (glucose and fructose) and proline by 3.5 and 4.5 times, respectively. Despite insignificant decrease in transpiration, the photosynthetic CO$_{2}$ exchange remained at the control level. After 7-day drought, the Asc content and AscP activity increased by a factor of 1.3 and 1.2, respectively, indicating the activation of the ascorbate/glutathione cycle. The content of glutathione and GR activity after 7-day drought remained unchanged. The content of reducing sugars doubled compared to control values, and the content of sucrose increased by a factor of 1.5. The proline content increased ninefold, whereas the content of chlorophyll and MDA remained unchanged. The photosynthetic rates decreased twofold, but the rate of dark respiration was unaffected. The results have shown that the drought-related recruitment of defense mechanisms follows a certain sequence. On the first stage of drought (5 days) the increase in carbohydrate and proline content ensured functioning of osmotic and antioxidant systems required for photosynthesis. On the second stage (7 days) the effectiveness of antioxidant systems increased notably, owing to the increase in AscP activity and the build-up of Asc, soluble carbohydrate, and proline content. Thus, the sequential mobilization of defense mechanisms in response to aggravating leaf water deficit sufficed to prevent oxidative stress. |
| Starting Page | 314 |
| Ending Page | 321 |
| Page Count | 8 |
| File Format | |
| ISSN | 10214437 |
| Journal | Russian Journal of Plant Physiology |
| Volume Number | 62 |
| Issue Number | 3 |
| e-ISSN | 16083407 |
| Language | English |
| Publisher | Pleiades Publishing |
| Publisher Date | 2015-04-29 |
| Publisher Place | Moscow |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Zea mays soil drought CO$_{2}$/H$_{2}$O gas exchange antioxidant system sugars proline MDA Plant Physiology Plant Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|