Effects of exogenous injection of different sugars on leaf photosynthesis, dry matter production and adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) activity in sweet potato, Ipomoea batatas (Lam.)

M. Kadowaki, F. Kubota, Kazuyuki Saitou

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7 Citations (Scopus)

Abstract

Solutions of sucrose, glucose and fructose were artificially injected into the stems of sweet potato plants. The effects of solution injection on both dry matter production and the activity of adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) in tuberous roots were investigated and compared. The total weight of carbon (Tc) artificially and photosynthetically supplied to a plant during the treatment period of 40 days was 0.987-1.869 times the weight of photosynthetically assimilated carbon alone. At the final sampling time, the dry matter weight of tuberous roots in the plants injected with sugar solutions showed a 2.73-9.13-fold increase over that of the control plant. The root weight linearly increased with Tc. The activity of AGPase was also enhanced by solution injections, with 27-63 % increases compared to the control, but was not significantly related to Tc. The injection of sugar solutions is concluded to have a dual effect on root production in sweet potato. One effect is that the increased sugar concentration in the plant increases AGPase and sink activities, and the other effect is that the increased carbon supply quantitatively promotes starch synthesis and accumulation in roots.

Original languageEnglish
Pages (from-to)37-41
Number of pages5
JournalJournal of Agronomy and Crop Science
Volume186
Issue number1
DOIs
Publication statusPublished - Apr 12 2001

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adenosine diphosphate
Ipomoea batatas
sweet potatoes
dry matter accumulation
photosynthesis
injection
sugars
glucose
leaves
carbon
fructose
starch
sucrose
stems
synthesis

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Plant Science

Cite this

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title = "Effects of exogenous injection of different sugars on leaf photosynthesis, dry matter production and adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) activity in sweet potato, Ipomoea batatas (Lam.)",
abstract = "Solutions of sucrose, glucose and fructose were artificially injected into the stems of sweet potato plants. The effects of solution injection on both dry matter production and the activity of adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) in tuberous roots were investigated and compared. The total weight of carbon (Tc) artificially and photosynthetically supplied to a plant during the treatment period of 40 days was 0.987-1.869 times the weight of photosynthetically assimilated carbon alone. At the final sampling time, the dry matter weight of tuberous roots in the plants injected with sugar solutions showed a 2.73-9.13-fold increase over that of the control plant. The root weight linearly increased with Tc. The activity of AGPase was also enhanced by solution injections, with 27-63 {\%} increases compared to the control, but was not significantly related to Tc. The injection of sugar solutions is concluded to have a dual effect on root production in sweet potato. One effect is that the increased sugar concentration in the plant increases AGPase and sink activities, and the other effect is that the increased carbon supply quantitatively promotes starch synthesis and accumulation in roots.",
author = "M. Kadowaki and F. Kubota and Kazuyuki Saitou",
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T1 - Effects of exogenous injection of different sugars on leaf photosynthesis, dry matter production and adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) activity in sweet potato, Ipomoea batatas (Lam.)

AU - Kadowaki, M.

AU - Kubota, F.

AU - Saitou, Kazuyuki

PY - 2001/4/12

Y1 - 2001/4/12

N2 - Solutions of sucrose, glucose and fructose were artificially injected into the stems of sweet potato plants. The effects of solution injection on both dry matter production and the activity of adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) in tuberous roots were investigated and compared. The total weight of carbon (Tc) artificially and photosynthetically supplied to a plant during the treatment period of 40 days was 0.987-1.869 times the weight of photosynthetically assimilated carbon alone. At the final sampling time, the dry matter weight of tuberous roots in the plants injected with sugar solutions showed a 2.73-9.13-fold increase over that of the control plant. The root weight linearly increased with Tc. The activity of AGPase was also enhanced by solution injections, with 27-63 % increases compared to the control, but was not significantly related to Tc. The injection of sugar solutions is concluded to have a dual effect on root production in sweet potato. One effect is that the increased sugar concentration in the plant increases AGPase and sink activities, and the other effect is that the increased carbon supply quantitatively promotes starch synthesis and accumulation in roots.

AB - Solutions of sucrose, glucose and fructose were artificially injected into the stems of sweet potato plants. The effects of solution injection on both dry matter production and the activity of adenosine 5′-diphosphate glucose pyrophosphorylase (AGPase) in tuberous roots were investigated and compared. The total weight of carbon (Tc) artificially and photosynthetically supplied to a plant during the treatment period of 40 days was 0.987-1.869 times the weight of photosynthetically assimilated carbon alone. At the final sampling time, the dry matter weight of tuberous roots in the plants injected with sugar solutions showed a 2.73-9.13-fold increase over that of the control plant. The root weight linearly increased with Tc. The activity of AGPase was also enhanced by solution injections, with 27-63 % increases compared to the control, but was not significantly related to Tc. The injection of sugar solutions is concluded to have a dual effect on root production in sweet potato. One effect is that the increased sugar concentration in the plant increases AGPase and sink activities, and the other effect is that the increased carbon supply quantitatively promotes starch synthesis and accumulation in roots.

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