2 edition of Physiological age of potato seed tubers found in the catalog.
Physiological age of potato seed tubers
Robert Francis Sacher
Written in English
|Statement||by Robert Francis Sacher.|
|The Physical Object|
|Pagination||xi, 104 leaves :|
|Number of Pages||104|
The seed storage sequences in each case involved early or late accumulation of temperature to produce a physiological age of day-degrees > 4 °C. The effects of seed crop husbandry on most variables were small, with the exception of date of dormancy break, which occurred earliest when the seed crop was planted and harvested early. Physiological Aging of Seed Tubers Pages in tuber aging section: Physiological Aging of Seed Tubers Pages in tuber aging section: Effect of physiological age on growth vigour of seed potatoes of two cultivars. 5. Review of literature and integration of some experimental results. Potato Res Ag. Communications Bldg. Lincoln.
The effects of plant growth regulators [6-benzyl amino purine (BA), indoleacetic acid (IAA), 2,4-dichlorophenoxyacetic acid (2,4-D), gibberellic acid (GA 3), chlormequat chloride (CCC), daminozide] and their time of application on tuberisation and physiological age of cv. Chacasina F 1 grown from true potato seed (TPS) were studied in four experiments conducted in spring or autumn . Tuber Aging. Certified potato (Solanum tuberosum L. cv Russet Burbank) seed-tubers, obtained directly from a local grower at harvest, were aged for 3 to 30 months in storage (at 4°C and 95% RH).These storage conditions were inhibitory to sprouting. Seed-tuber age was calculated from harvest. For discussion, 3- to 6-month-old tubers are considered to be physiologically “young” and tubers.
The time of application of gibberellic acid on potato tuber growth and physiological ageing was studied. Potato plants derived from botanical seed were sprayed at five stages during their growth cycle, and tubers were harvested at day intervals after treatment. It was found that hybrid Chacasina F1 forms tubers until approximately 50 days after transplantation irrespective of the season. When seed tubers are too large in size, some growers cut them into pieces. In a few niches, growers transplant rooted cuttings to the field to grow seed for the next one or two generations. Dormancy and sprouting are associated with the physiological age of the seed tuber. Age is often expressed as the temperature sum in day degrees after.
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The physiological age of the seed starts when the tubers are being formed. It is influenced by variety, temperature, day Physiological age of potato seed tubers book and stress etc. The stages of the physiological age are in Table 1. Table 1.
Stages of physiological age of seed potatoes. A study was conducted at the National Root Crops Research Institute (NRCRI), Potato Programme Kuru, Jos Plateau State, Nigeria during the and to investigate physiological ageing of potato (Solanum tuberosum L.) seed tubers as affected by storage conditions and storage duration in Jos, Plateau state, Nigeria.
Five potato. Moll, A., (): The effects of physiological aging of seed tubers on growth characteristics of eight potato cultivars tested under controlled conditions, Plant Breeding Abs., Vol. 64, No. Physiological age index: a new, simple and reliable index to assess the physiological age of seed potato tubers based on haulm killing date.
According to Carrie Huffman Wohleb, Associate Professor and Regional Specialist â€“ Potato, Vegetable, and Seed Crops at Washington State University, physiological age is an important concept in potato production. “The physiological age of seed tubers determines when the buds will sprout and how many sprouts will develop from those buds.
Van der Zaag DE, Van Loon CD () Effect of physiological age on growth vigour of seed potatoes of two cultivars.
Literature review and integration of some experimental results. Potato Res − Van Ittersum MK, Scholte K, Kupers LJP () A method to assess cultivar differences in rate of physiological ageing of seed tubers.
Prior to planting in the field, five physiological ages of Russet Burbank, Carlton, Norchip and Superior seed-tubers were produced by varying the heat-unit accumulation over a d storage interval.
Total yield increases of up to 90% and substantial improvements in tuber grade were achieved by planting aged (– degree-day (dd)) seed-tubers. Physiological age is an important concept in potato production.
The physiological age of seed tubers determines when the buds will sprout and how many sprouts will develop from those buds.
It affects stem numbers and vine growth. It also influences tuber development and can have a significant impact on tuber yield and size distribution. Physiological readiness to grow is an important factor in determining the production potential of potato tubers.
This is usually referred to as physiological age of seed. Physiological age can be compared to an internal clock and impacts all aspects of crop production. The physiological age of potato seed-tubers is difficult to determine because of a lack of criteria for measurement.
Physiological age is comprised of three main attributes, the developmental, physiological and biochemical condition of a tuber at any particular point in time. Physiological age is therefore a function of the processes to which. In most areas the time of year selected for potato growing often proves unfavourable for the use of seed tubers at the proper age (Fig.
1 and Table 2). This is because physiological degeneration is extremely widely distributed and the loss is also large, and special measures have to be taken to obtain seed tubers of the proper age.
The physiological age is a key component of tuber seed quality and growth vigour that should be kept at a low level to better manipulate potato crop in such a way that it will produce the best yield and quality (Oliveira et al., ).
This study analysed new potatoes from two intraspecific somatic hybrid lines (CN1 and CN2) for their. Potato seed tuber physiological age and tolerance of attack by the potato cyst nematode Globodera pallida Author: Haydock, Patrick Peter John ISNI: Awarding Body: Council for National Academic Awards Current Institution: University of Bedfordshire.
moment seed potato fields and harvested tubers are screened visually for rotting in Finland and large amounts of contaminated plants and tubers are discarded. Because also healthy-looking seed potatoes can contain latent infections, the occurrence of the disease is unpredictable, which leads to reclamations and reduced markets for seed potatoes.
Purchase Potato Physiology - 1st Edition. Print Book & E-Book. ISBNYield components of potato are largely affected by the physiology age of the tuber seeds at planting. The current study focuses on monitoring seed tuber aging in two CN1 and CN2 somatic hybrid lines and Spunta (Sp) variety during days of storage at 4 °C.
Aging rate was monitored based on sprouting, emergence and tissue oxidation rates. Introduction. Potato (Solanum tuberosum L.) seed tubers are used as multiplication organs and have to be stored for up to 1 year at low temperature before this post-harvest storage, the tubers undergo an evolution of their physiological state that influences their sprouting capacity, hence conditioning the yield of the crop (Coleman, ; Delaplace et al., a, b).
Seed Age The age of potato seed can be defined in two ways: chronological age and physiological age. Chronological age of seed is simply the number of days that have passed since harvest.
Physiological age, however, is more difficult to define, but probably has a greater impact on performance than chronological age. Physiological age may be. Investigations on potato tuber dormancy are of basic importance for both food products and seed tubers.
The physiology of dormancy is not clear, although significant progress has been made in recent years. Plant hormones are involved in dormancy control, but experimental evidence is often contradictory.
The physiological age of seed is an important factor in choosing potato seed. Factors affecting the physiological age of tubers include growing season stress, storage temperature and time.
Temperature is very important because warmer storage temperatures will speed the aging process of the tubers. Caldiz DO, Fernandez LV, Struik PC () Physiological age index: a new, simple and reliable index to assess the physiological age of seed potato tubers based on haulm killing date and length of the incubation period.
Field Crops Res − Article Google Scholar.In the course of physiological studies the dormancy period was found to vary from 8 or 9 weeks for Early Rose and IS 29, to 17 weeks for IS Varieties were compared for the yield which they gave when grown from autumn-grown stored tubers and spring-grown ethylene chlorhydrin treated tubers.
According to the length of the rest period and their response to-ethylene, 38 varieties were.Knowles, N.R. and G.N.M. Kumar. Physiological age of potato seed-tubers: biological basis and relevance to production.
Invited seminar on behalf of the Physiology Section of the Potato Association of America. Abstract. XXVIth International Horticultural Congress & Exhibition (IHC ), Toronto, Ontario, Canada (Aug. 12).