Effects of exogenous injection of sucrose solution to plant on the carbon distribution to tuberous root and tuberous root production in sweet potato, Ipomoea batatas Lam.

Masayuki Kadowaki, Fumitake Kubota, Kazuyuki Saitou

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The sink and source balance in a sweet potato plant was artificially changed by exogenously injecting a 6% sucrose solution into the cut end of the stem, and its effect on the photosynthate transport from leaves to roots were studied. The results obtained were as follows: The 13CO2 feeding experiment revealed that the sucrose injection enhanced the distribution ratio of photosynthate in roots. The injection directly before the commencement stage of root tuberization was the most effective in increment of root production, with a significant increase in the activity of adenosine 5′-diphosphate glucose pyrophophorylase (AGPase). On the other hand, little effect was shown in a plant injected past this stage. It may be considered that the sucrose solution fed at the adequate growth stage quickly moved down to increase the sugar concentration in roots, and this acted as a trigger for increase in the activities of enzymes such as AGPase related to starch synthesis and then enhancement of the sink activity. This may lead to the promotion of photosynthate transport to roots and increase of root yield. Our experimental results suggest that the timely enhancement of source activity is important to activate the sink function of sweet potato roots.

Original languageEnglish
Pages (from-to)575-579
Number of pages5
JournalJapanese Journal of Crop Science
Volume70
Issue number4
DOIs
Publication statusPublished - Jan 1 2001

Fingerprint

Ipomoea batatas
Adenosine Diphosphate Glucose
sweet potatoes
Sucrose
Carbon
sucrose
injection
Injections
carbon
photosynthates
adenosine diphosphate
Starch
Enzymes
Growth
glucose
developmental stages
starch
enzyme activity
sugars
stems

All Science Journal Classification (ASJC) codes

  • Food Science
  • Agronomy and Crop Science
  • Genetics

Cite this

@article{7c24a85902fe4c6bafe89acfc4c5ea10,
title = "Effects of exogenous injection of sucrose solution to plant on the carbon distribution to tuberous root and tuberous root production in sweet potato, Ipomoea batatas Lam.",
abstract = "The sink and source balance in a sweet potato plant was artificially changed by exogenously injecting a 6{\%} sucrose solution into the cut end of the stem, and its effect on the photosynthate transport from leaves to roots were studied. The results obtained were as follows: The 13CO2 feeding experiment revealed that the sucrose injection enhanced the distribution ratio of photosynthate in roots. The injection directly before the commencement stage of root tuberization was the most effective in increment of root production, with a significant increase in the activity of adenosine 5′-diphosphate glucose pyrophophorylase (AGPase). On the other hand, little effect was shown in a plant injected past this stage. It may be considered that the sucrose solution fed at the adequate growth stage quickly moved down to increase the sugar concentration in roots, and this acted as a trigger for increase in the activities of enzymes such as AGPase related to starch synthesis and then enhancement of the sink activity. This may lead to the promotion of photosynthate transport to roots and increase of root yield. Our experimental results suggest that the timely enhancement of source activity is important to activate the sink function of sweet potato roots.",
author = "Masayuki Kadowaki and Fumitake Kubota and Kazuyuki Saitou",
year = "2001",
month = "1",
day = "1",
doi = "10.1626/jcs.70.575",
language = "English",
volume = "70",
pages = "575--579",
journal = "Japanese Journal of Crop Science",
issn = "1349-0990",
publisher = "日本作物学会",
number = "4",

}

TY - JOUR

T1 - Effects of exogenous injection of sucrose solution to plant on the carbon distribution to tuberous root and tuberous root production in sweet potato, Ipomoea batatas Lam.

AU - Kadowaki, Masayuki

AU - Kubota, Fumitake

AU - Saitou, Kazuyuki

PY - 2001/1/1

Y1 - 2001/1/1

N2 - The sink and source balance in a sweet potato plant was artificially changed by exogenously injecting a 6% sucrose solution into the cut end of the stem, and its effect on the photosynthate transport from leaves to roots were studied. The results obtained were as follows: The 13CO2 feeding experiment revealed that the sucrose injection enhanced the distribution ratio of photosynthate in roots. The injection directly before the commencement stage of root tuberization was the most effective in increment of root production, with a significant increase in the activity of adenosine 5′-diphosphate glucose pyrophophorylase (AGPase). On the other hand, little effect was shown in a plant injected past this stage. It may be considered that the sucrose solution fed at the adequate growth stage quickly moved down to increase the sugar concentration in roots, and this acted as a trigger for increase in the activities of enzymes such as AGPase related to starch synthesis and then enhancement of the sink activity. This may lead to the promotion of photosynthate transport to roots and increase of root yield. Our experimental results suggest that the timely enhancement of source activity is important to activate the sink function of sweet potato roots.

AB - The sink and source balance in a sweet potato plant was artificially changed by exogenously injecting a 6% sucrose solution into the cut end of the stem, and its effect on the photosynthate transport from leaves to roots were studied. The results obtained were as follows: The 13CO2 feeding experiment revealed that the sucrose injection enhanced the distribution ratio of photosynthate in roots. The injection directly before the commencement stage of root tuberization was the most effective in increment of root production, with a significant increase in the activity of adenosine 5′-diphosphate glucose pyrophophorylase (AGPase). On the other hand, little effect was shown in a plant injected past this stage. It may be considered that the sucrose solution fed at the adequate growth stage quickly moved down to increase the sugar concentration in roots, and this acted as a trigger for increase in the activities of enzymes such as AGPase related to starch synthesis and then enhancement of the sink activity. This may lead to the promotion of photosynthate transport to roots and increase of root yield. Our experimental results suggest that the timely enhancement of source activity is important to activate the sink function of sweet potato roots.

UR - http://www.scopus.com/inward/record.url?scp=0035682640&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035682640&partnerID=8YFLogxK

U2 - 10.1626/jcs.70.575

DO - 10.1626/jcs.70.575

M3 - Article

AN - SCOPUS:0035682640

VL - 70

SP - 575

EP - 579

JO - Japanese Journal of Crop Science

JF - Japanese Journal of Crop Science

SN - 1349-0990

IS - 4

ER -