| Autor: |
Veerarajan, Vijayaragavan1, Thangavelu, Sumathi2 sumathi.t@tnau.ac.in, Perianadar, Irene Vethamoni3, Veerasamy, Ravichandran4, Marimuthu, Raju5 |
| Předmět: |
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| Zdroj: |
Fresenius Environmental Bulletin. 2024, Vol. 33 Issue 10, p896-903. 8p. |
| Abstrakt: |
This study aimed to evaluate the drought tolerance capacity of different perennial genotypes of Moringa grafted onto the annual Moringa variety PKM 1. Conducted as a pot culture experiment at the TNAU Glasshouse, Coimbatore, during 2023-2024, the research used a Factorial Completely Randomized Design (FCRD) involving two types of grafts and PKM 1 un-grafted plants under three levels of field capacity 100%, 75%, and 50% FC. The graft combinations included PKM 1 grafted onto Moolanur Moringa and Karumbu Moringa rootstocks. Results indicated that grafted plants, especially PKM 1 grafted onto Karumbu Moringa, outperformed others in physiological, biochemical, and growth parameters under drought conditions. Enhanced gas exchange parameters in grafted plants suggested improved photosynthetic efficiency and drought tolerance The results indicated that PKM 1 grafted onto Karumbu Moringa exhibited the highest photosynthetic rate (9.46 μmol CO2 m-2 s-1 at 50%) with superior transpiration (1.52 mmol H2O m-2 s-1 at 50%) and stomatal conductance (0.078mol H2O m-2 s-1 at 50%). In contrast, un-grafted PKM 1 showed the lowest photosynthetic rate, particularly at reduced field capacity (6.35 μmol CO2 m-2 s-1 at 50%). Water use efficiency was highest in PKM 1 grafted onto Moolanur Moringa (6.10 µmol CO2 mmol-1 H2O at at 50% FC). Higher proline (75.63ug /g FW), soluble sugars (16.06µmol/g FW), and antioxidant enzyme catalase (0.489 units/min/g FW) and peroxidase (1.364units/min/g FW) in PKM 1 grafted onto Karumbu moringa at 50% FC indicated superior stress adaptation. These findings highlight the potential of drought-tolerant rootstocks in enhancing Moringa's resilience and productivity in water-limited environments. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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