Root System Development of Cassava and Sweetpotato during Early Growth Stage as Affected by High Root Zone Temperature

Pardales, J. R.; Bañoc, Dionisio M.; Yamauchi, Akira; Iijima, Morio; Kono, Yasuhiro

doi:10.1626/pps.2.247

Cited by 29 publications

(37 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Villordon et al (2011;2010) emphasized that soil temperatures 30°C and greater in the upper 10 cm of the soil profile during the establishment and storage root initiation phases reduced adventitious root counts and storage root yields. Research by Pardales et al (1999) has supported this and has indicated those root zone temperatures of 40°C or higher have greater effects on length and development in adventitious roots. This may also have a greater effect on the deeper nodes at lower soil temperatures.…”

Section: Temperature Effectmentioning

confidence: 77%

“…The transplanting shock which often leads to poor storage root development and growth above 28°C, has been reported (Pardales et al 1999;Coleman et al 2006;Belehu 2003Belehu , 2004. High temperature without adequate cooling from irrigation can cause leaf loss and has a dramatic impact on adventitious root development (Coleman et al 2003).…”

Section: Statement Of Parts Of the Thesis Submitted To Qualify For Thmentioning

confidence: 99%

“…High temperature without adequate cooling from irrigation can cause leaf loss and has a dramatic impact on adventitious root development (Coleman et al 2003). Pardales et al (1999) reported that high root zone temperature above the optimum range will adversely affect root development which may lead to poor yield at harvesting. It is therefore important that soil temperature at the root zone during the first few days after transplanting is suitable to initiate adventitious root and subsequent storage root yield production.…”

Section: Statement Of Parts Of the Thesis Submitted To Qualify For Thmentioning

confidence: 99%

“…'Thick' pigmented roots are capable of producing storage roots. The 'thin' white fibrous roots that remained unchanged are distinguishable, as thick pigmented roots are cream-coloured, pink or red on the surface of roots that are producing 'storage root' under conducive environments (Kays 1985;Pardales et al 1999;Firon et al 2009). The thickening evolves into 'setting' growth of storage roots.…”

Section: Crop Descriptionmentioning

confidence: 99%

“…Extreme high temperature without adequate cooling from irrigation can cause leaf loss and can have a dramatic impact on adventitious root development (Coleman et al 2003). Research by Pardales et al (1999) has indicated that root zone temperatures of 40°C or even higher have greater effect on length and development in adventitious roots. This may also have a greater effect on the deeper nodes at lower soil temperatures.…”

Section: Temperature Effectmentioning

confidence: 99%

See 4 more Smart Citations

Studies on propagation materials and growing conditions for sweetpotato [Ipomoea Batatas (L.) Lam] production

Atu¹

View full text Add to dashboard Cite

A thesis submitted for the degree of Master of Philosophy atThe University of Queensland in 2013 School of Agriculture and Food Sciences i ABSTRACTSweetpotato propagation is cultivated through use of sprout (slip) or vine cutting. Production of sprout is increased by best selection of storage root sizes to optimize growth and yield.Cultivars of different storage root sizes produced variable numbers of sprouts, varying in length and thickness and to explore this four storage root sizes in an open field bed were trialed. Beauregard and Northern Star storage roots selected from the large, medium, smallmedium and small storage root category sown in bed and sprouts at three length classes were first measured 47 days after sowing. The next three harvests were measured at 21 days interval while the fifth harvest was at 44 days after the fourth, calculated from the Growing Degree Days (GDD) units. Beauregard produced significantly higher number of sprout at >20 cm but fewer > 35 cm length than Northern Star. The sprout length 20 -35 cm class increased for both varieties after Harvest 1 but Beauregard tended to increase less for this class than Northern Star with progressive harvests. In the fifth harvest 20 -35 cm length class for both varieties had reduced although Northern Star produced more for this class than Beauregard. A significantly higher number of sprouts were produced by large root but not significantly different from the medium root. Sprout categories for < 20 and 20 -35 cm were greater for large and medium roots than smaller roots. The thickness of sprout progressively decreased in numbers as storage roots size decreased. Sprouts longer than 20 cm are considered best propagation material for farmers and to achieve this within the best possible short period is an advantage to farmers.The experiment study on seven sweetpotato varieties for pathogen tested (PT) and nonpathogen tested (NPT) was investigated at 60 days after planting (DAP), 120 DAP and 220 DAP for yield differences. There was no significant difference (P < 0.05) for all varieties for early root growth at 60 (DAP). No significant difference was observed for PT and Non-PT for the marketable yield but a significant increase in non-marketable yield at 120 DAP and 220 DAP for PT and non-PT was presumably due to virus infection.The number of marketable storage root production declined as the crop grew older but the opposite trend occurred for the non-marketable yield which increased three fold in the final harvest compared to the previous harvest. Northern Star produced the highest number and weight of marketable and non-marketable roots compared to the other six varieties.ii LD02 and Beauregard were the second best varieties in terms of marketable roots while L49, Vekeoli and Lola Tonga had the least potential. Northern Star followed by Beauregard and LD02 proved their supremacy by their ability to partition dry matter to bulk storage root.Beauregard was the only variety observed with SPFMV infection in the foliage.High soil temperatures affected the...

show abstract

Section: Temperature Effectmentioning

confidence: 77%

Section: Statement Of Parts Of the Thesis Submitted To Qualify For Thmentioning

confidence: 99%

Section: Statement Of Parts Of the Thesis Submitted To Qualify For Thmentioning

confidence: 99%

Section: Crop Descriptionmentioning

confidence: 99%

Section: Temperature Effectmentioning

confidence: 99%

See 3 more Smart Citations

Studies on propagation materials and growing conditions for sweetpotato [Ipomoea Batatas (L.) Lam] production

Atu¹

View full text Add to dashboard Cite

show abstract

Cassava‐Based Multiple Cropping Systems

Ravi

Mohankumar

2003

Horticultural Reviews

View full text Add to dashboard Cite

Molecular Regulation of Storage Root Formation and Development in Sweet Potato

Ravi¹,

Chakrabarti²,

Makeshkumar³

et al. 2014

Horticultural Reviews: Volume 42

View full text Add to dashboard Cite

Storage root formation and development in sweet potato [Ipomoea batatas (L) Lam. Convolvulaceae] is a complex process characterized by the cessation of root elongation, genesis of vascular cambium, anomalous and interstitial cambia, and increase in radial growth by increased cell proliferation and expansion concomitant with the massive deposition of starch and storage proteins that eventually result in storage root enlargement. Phytohormones play a crucial role in the formation of storage roots. Three class I knotted-like homeobox (KNOX1) genes-SRF1, SRF5, and SRF6-modulate carbohydrate metabolism and cell division. The genes Ibkn1 and Ibkn2 activate cytokinin biosynthesis. Transcription factors derived from MADS box genes IbMADS1, IbMADS3, IbMADS4, and IbAGL17 induce signal transduction pathway leading to storage root formation and development. The occurrence of SRD1 transcripts mainly in the actively dividing cells, including the vascular and cambium cells, and the increase in endogenous indole-3-acetic acid (IAA) content and three auxin-inducible AUX/IAA gene transcripts concomitantly with SRD1 transcripts suggest the involvement of SRD1 during the early stage of storage root development. Along with IbMADS1 induction, two storage root marker genes, which encode a major storage protein sporamin and IbAGPase that encodes AGPase for ADP-glucose production in starch biosynthesis, are up-regulated during the early period of storage root development. A class III HD-Zip protein 8 regulating the development of cambia and secondary vascular tissues, a short-root protein that is a key regulator in root 157 radial patterning, meristem maintenance, and asymmetric cell division, the expansin gene IbEXP1 encoding a cell wall loosening protein, genes encoding cyclin A-and cyclin D-like proteins, and five cyclin-dependent kinases are upregulated during storage root formation. Genes encoding ADP-glucose pyrophosphorylase, granule-bound starch synthase, starch synthase, and phosphoglucomutase are up-regulated, whereas genes encoding pyruvate decarboxylase and lactate dehydrogenase are down-regulated during storage root development. The endogenous sucrose levels influence the expression of two AGPase isoforms: ibAGP1 and ibAGP2. The expression of cell wall-bound (extracellular/apoplast) acid invertase activity gene (cwINV) predominates during early period, whereas the expression of cytosolic activity of sucrose synthase gene (SuSy) predominates during later period of storage root enlargement. The competition between lignification and formation of anomalous cambia and the associated starchaccumulating cells determine storage root development. Genes encoding enzymes such as coumaroyl-CoA synthase, caffeoyl-CoA O-methyltransferase, and cinnamyl alcohol dehydrogenase during storage root formation reduce lignification in tissue sections of storage roots.

show abstract

Root System Development of Cassava and Sweetpotato during Early Growth Stage as Affected by High Root Zone Temperature

Cited by 29 publications

References 10 publications

Studies on propagation materials and growing conditions for sweetpotato [Ipomoea Batatas (L.) Lam] production

Studies on propagation materials and growing conditions for sweetpotato [Ipomoea Batatas (L.) Lam] production

Cassava‐Based Multiple Cropping Systems

Molecular Regulation of Storage Root Formation and Development in Sweet Potato

Contact Info

Product

Resources

About