Drought and nematode stress management in cotton through grafting and endophyte enrichment
Two novel strategies for cotton cultivation: grafting upland cotton onto stress-tolerant tree cotton rootstock, and enriching plants with habitat-adapted endophytes. These approaches address drought and nematode stresses that are difficult to introgress through conventional breeding, offering scalable solutions for cotton growers facing challenging growing conditions.
Overview
Cotton cultivation faces significant challenges from drought and nematode stresses, which are difficult to address through conventional breeding approaches. This solution offers two complementary strategies to manage these stresses: grafting upland cotton (Gossypium hirsutum) onto tree cotton (Gossypium arboreum) rootstock, and enriching cotton plants with habitat-adapted endophytes that confer stress tolerance. Both approaches leverage the natural resilience mechanisms found in wild or stress-adapted plant species, making them practical alternatives to lengthy breeding programs.
Technical specifications
Grafting approach:
- 15-day old G. hirsutum scions successfully grafted onto G. arboreum stocks with 100 percent success rate
- Manual grafting achievable at approximately 200 grafts per hour per person
- Method theoretically adaptable for mechanization using existing vegetable seedling grafting equipment
- Three-month old grafted plants demonstrate normal or better vegetative growth compared to non-grafted plants
- Tree cotton rootstock provides natural drought and nematode tolerance traits
Endophyte enrichment approach:
- Strategy validated using salt-tolerant rice endophytes to confer salt tolerance in susceptible rice cultivars
- Endophytes from stress-adapted plants can be transferred to sensitive cultivars
- Approach enables crops to benefit from stress tolerance mechanisms without genetic modification
Technology readiness level
The grafting technique has demonstrated proof of concept with successful graft formation and healthy plant development over three months. The endophyte enrichment strategy has been validated in a related crop system (rice). Next steps include greenhouse evaluation of stress, nematode, and soil-borne disease tolerance in grafted and endophyte-enriched plants compared to controls, followed by multi-location field testing for drought, nematode, and soil-borne disease resistance. Adaptability for machine grafting will be evaluated in collaboration with a partner institute possessing vegetable seedling grafting equipment.
About University of Agriculture Faisalabad
The Institute of Horticultural Sciences is a specialized academic and research unit within the public University of Agriculture Faisalabad in Pakistan, embedded in a large agricultural campus with a strong applied orientation. Corporate partners access field research farms, controlled‑environment greenhouses, and postharvest laboratories to prototype, validate, and scale solutions under near‑commercial conditions. Strong outreach and extension ties connect faculty and students with growers, packers, and input suppliers, enabling rapid field trials, training, and technology adoption. Research is supported by national funding programs and competitive international development grants. A dedicated technology transfer office facilitates IP protection, licensing, sponsored research, and access to pilot‑ready facilities.
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