Abstract
We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances. Plants were raised in vitro, planted in soil in gauze-insulated stands, and grown at irradiances of 100, 200, and 380 W/m 2 of photosynthetically active radiation. Wild-type plants (WT) and the plants transformed with yeast invertase gene (B33- inv ) were used. In the beginning of flowering stage, assimilation of 14 CO 2 and 14 C incorporation into photosynthates were measured. Irrespective of irradiance, the carbon assimilation was higher in WT plants, than in transformed B33- inv plants. In the plants studied, we observed divergent light dependences of 14 C inclusion into sucrose: the highest labeling was observed at low irradiance in WT plants and at high irradiance in B33- inv transformed plants. The content of 14 C incorporated into amino acids changed in the opposite direction compared to 14 C incorporation into sucrose. Irrespective of the plant type, similar light dependences were observed for 14 C content in the products of glycolate metabolism and in glycerate. At the intermediate irradiance, the patterns of 14 C distribution among photosynthetic products showed minimal differences between the plants of two types. The role of apoplast invertase in sugar export from the leaf and the possible control of plant productivity through this enzyme activity are discussed.
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Claims 6
Claim · model-written summary
Yeast invertase gene transformation lowered carbon assimilation in potato relative to wild-type plants, irrespective of irradiance.
- Taxon
- potato
Solanum tuberosume1 - Material
- cv. Desireee1
- Treatment
- yeast invertase gene ( inv )e1
- Outcome
- carbon assimilatione3
- Direction
- highere3
- Qualifier
- Irrespective of irradiancee3
- Comparator
- Wild-type plants (WT)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances”
e2“Wild-type plants (WT) and the plants transformed with yeast invertase gene (B33- inv) were used”
e3“Irrespective of irradiance, the carbon assimilation was higher in WT plants, than in transformed B33- inv plants”
Claim · model-written summary
In wild-type potato at low irradiance, 14C inclusion into sucrose is highest.
- Taxon
- potatoSolanum tuberosume1
- Material
- WT plantse2
- Treatment
- low irradiancee2
- Outcome
- 14 C inclusion into sucrosee2
- Direction
- higheste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances”
e2“In the plants studied, we observed divergent light dependences of 14 C inclusion into sucrose: the highest labeling was observed at low irradiance in WT plants and at high irradiance in B33- inv transformed plants”
Claim · model-written summary
In B33-inv transformed potato at high irradiance, 14C inclusion into sucrose is highest.
- Taxon
- potatoSolanum tuberosume1
- Material
- B33- inv transformed plantse2
- Treatment
- high irradiancee2
- Outcome
- 14 C inclusion into sucrosee2
- Direction
- higheste2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances”
e2“In the plants studied, we observed divergent light dependences of 14 C inclusion into sucrose: the highest labeling was observed at low irradiance in WT plants and at high irradiance in B33- inv transformed plants”
Claim · model-written summary
The content of 14C incorporated into amino acids changes in the opposite direction to 14C incorporation into sucrose.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- content of 14 C incorporated into amino acidse2
- Direction
- opposite directione2
- Comparator
- incorporation into sucrosee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances”
e2“The content of 14 C incorporated into amino acids changed in the opposite direction compared to 14 C incorporation into sucrose”
Claim · model-written summary
Irrespective of plant type, 14C content in the products of glycolate metabolism and in glycerate shows similar light dependences.
- Taxon
- potatoSolanum tuberosume1
- Outcome
- 14 C content in the products of glycolate metabolism and in glyceratee2
- Qualifier
- similar light dependencese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances”
e2“Irrespective of the plant type, similar light dependences were observed for 14 C content in the products of glycolate metabolism and in glycerate”
Claim · model-written summary
At intermediate irradiance, the patterns of 14C distribution among photosynthetic products show no change between the two plant types.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- intermediate irradiancee2
- Outcome
- patterns of 14 C distribution among photosynthetic productse2
- Direction
- no_changeinferrede2
- Qualifier
- minimal differences between the plants of two typese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“We studied the influence of yeast invertase gene ( inv ), with the apoplastic localization of the enzyme, on photosynthesis of potato plants ( Solanum tuberosum L., cv. Desiree) grown at various irradiances”
e2“At the intermediate irradiance, the patterns of 14 C distribution among photosynthetic products showed minimal differences between the plants of two types”