Abstract
Abiotic stresses such as drought, temperature, salinity and others generally reduce crop productivity. The abiotic stresses are location-specific, exhibiting internal variation in occurrence, intensity and duration. These could occur at any stage of plant growth and development which represent the dynamic nature of crop plants and their yield. A few transgenics in tobacco and rice overproducing osmolytes and stress proteins have been produced and tested jor tolerance to salt and drought stress in the vegetative stage. The genes being manipulated are not mechanistically linked with the process of yield formation. Using biotechnological approach it is difficult to foresee abiotic stress-resistant transgenics growing in the farmer's field in the near future. It is suggested that breeding for drought tolerance requires the identification of traits for phenology and those contributing to yield so that these can be pyramided using conventional means.
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Claims 6
Claim · model-written summary
Abiotic stresses generally reduce crop productivity.
Verbatim
e0“Abiotic stresses such as drought, temperature, salinity and others generally reduce crop productivity”
t0“crop plants”
Claim · model-written summary
Abiotic stresses vary by location in occurrence, intensity and duration.
Verbatim
e0“The abiotic stresses are location-specific, exhibiting internal variation in occurrence, intensity and duration”
t0“crop plants”
Claim · model-written summary
Transgenic tobacco and rice overproducing osmolytes and stress proteins had been produced and tested for vegetative salt and drought tolerance.
- Taxon
- tobacco and rice
Nicotiana tabacum
Oryza sativae0 - Organ / stage
- vegetative stagee0
- Outcome
- tested jor tolerance to salt and drought stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A few transgenics in tobacco and rice overproducing osmolytes and stress proteins have been produced and tested jor tolerance to salt and drought stress in the vegetative stage”
Claim · model-written summary
The manipulated genes were not mechanistically linked to yield formation.
Not reportedDirection
Verbatim
e0“The genes being manipulated are not mechanistically linked with the process of yield formation”
t0“crop plants”
Claim · model-written summary
The authors judge near term field deployment of stress resistant transgenics unlikely.
Verbatim
e0“it is difficult to foresee abiotic stress-resistant transgenics growing in the farmer's field in the near future”
t0“crop plants”
Claim · model-written summary
The authors recommend identifying phenology and yield traits for conventional pyramiding to breed drought tolerance.
Verbatim
e0“It is suggested that breeding for drought tolerance requires the identification of traits for phenology and those contributing to yield so that these can be pyramided using conventional means”
t0“crop plants”