Abstract
Twelve cowpea (Vigna unguiculata) varieties were planted in wooden boxes of 130 cm length, 65 cm width, and 15 cm depth filled with sand and soil mixture (1:1) at 10 cm row to row and 5 cm plant-to-plant distances. The boxes were watered daily until the unifoliate leaves had fully expanded and the first trifoliates were beginning to emerge. Watering was then stopped to impose moisture stress, and effects of drought on the unifoliate and trifoliate leaves as well as growing tips were studied. Two types of drought tolerance mechanisms were observed. Under drought stress Type 1 drought tolerant lines TVu 11986 and TVu 11979 stopped growth and conserved moisture in all the plant tissues, stayed alive for over two weeks and gradually the entire plant parts dried together. The Type 2 drought tolerant lines like Dan Ila and Kanannado continued slow growth of the trifoliates. However, with continued moisture stress, the unifoliates of these varieties showed early senescence and dropped off but the growing tips remained turgid and alive for longer, suggesting that moisture was being mobilized from the unifoliates to the growing tips
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Claims 9
Claim · model-written summary
Two drought tolerance mechanisms were observed in cowpea.
- Taxon
- cowpea
Vigna unguiculatat0 - Outcome
- Two types of drought tolerance mechanismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two types of drought tolerance mechanisms were observed.”
t0“cowpea”
Claim · model-written summary
Type 1 lines stopped growth under drought.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- TVu 11986 and TVu 11979e0
- Treatment
- drought stresse0
- Outcome
- growthe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under drought stress Type 1 drought tolerant lines TVu 11986 and TVu 11979 stopped growth”
t0“cowpea”
Claim · model-written summary
Type 1 lines conserved moisture in plant tissues.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- moisture in all the plant tissuese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conserved moisture in all the plant tissues”
t0“cowpea”
Claim · model-written summary
Type 1 lines survived over two weeks under drought.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- stayed alivee0
- Value
- over two weekse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stayed alive for over two weeks”
t0“cowpea”
Claim · model-written summary
Type 1 plants gradually dried together.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- entire plant parts dried togethere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gradually the entire plant parts dried together”
t0“cowpea”
Claim · model-written summary
Type 2 lines continued slow trifoliate growth.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Dan Ila and Kanannadoe0
- Organ / stage
- trifoliatese0
- Outcome
- slow growth of the trifoliatese0
- Direction
- slowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Type 2 drought tolerant lines like Dan Ila and Kanannado continued slow growth of the trifoliates.”
t0“cowpea”
Claim · model-written summary
Type 2 unifoliates senesced early and dropped under sustained stress.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- unifoliatese0
- Treatment
- continued moisture stresse0
- Outcome
- early senescence and dropped offe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with continued moisture stress, the unifoliates of these varieties showed early senescence and dropped off”
t0“cowpea”
Claim · model-written summary
Type 2 growing tips remained turgid and alive longer.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- growing tipse0
- Outcome
- remained turgid and alive for longere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the growing tips remained turgid and alive for longer”
t0“cowpea”
Claim · model-written summary
The authors suggest moisture moved from unifoliates to growing tips.
- Taxon
- cowpeaVigna unguiculatat0
- Organ / stage
- unifoliatese0
- Outcome
- moisture was being mobilized from the unifoliates to the growing tipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“suggesting that moisture was being mobilized from the unifoliates to the growing tips”
t0“cowpea”