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Microtuberization in potato (Solanum tuberosum L.).

J Gopal¹, J L Minocha², H S Dhaliwal²

¹Division of Genetics, Central Potato Research Institute, Shimla-171 001, HP, India, , , , , , IN.

Plant Cell Reports

|February 10, 2019

Summary

This summary is machine-generated.

Optimizing potato microtuber production requires specific conditions. Short photoperiods, low temperatures, and 6-benzylaminopurine significantly enhance microtuber yield and weight, with genotype-specific protocols being crucial.

Keywords:

In vitro culture Key words Microtuberization Number of eyes Solanum tuberosum

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Area of Science:

Plant Science
Agricultural Biotechnology
Horticulture

Background:

Microtuberization is a key process for potato (Solanum tuberosum L.) propagation and germplasm conservation.
Optimizing in vitro culture conditions is essential for efficient microtuber production across diverse potato genotypes.

Purpose of the Study:

To investigate the effects of varying photoperiod, temperature, and 6-benzylaminopurine (BAP) on potato microtuberization.
To determine genotype-specific responses to different in vitro culture conditions for maximizing microtuber yield and quality.

Main Methods:

Twenty-two potato genotypes were cultured under six different in vitro conditions, manipulating photoperiod and temperature.
The impact of continuous darkness and BAP application on microtuberization was evaluated.
Microtuber yield, number, weight, and eye development were assessed.

Main Results:

Short photoperiods (10 h) and low temperatures (20°C/18°C) significantly increased microtuber yield and number compared to long days (16 h) and high temperatures (28°C/25°C).
Continuous darkness advanced microtuberization by 2-3 months in some genotypes.
6-benzylaminopurine application substantially boosted microtuber yield and average weight under various light and temperature regimes.
Microtubers produced under light had more eyes than those produced in darkness.

Conclusions:

In vitro culture conditions, particularly short photoperiods and low temperatures, profoundly influence potato microtuberization efficiency.
The plant growth regulator 6-benzylaminopurine is highly effective in enhancing microtuber yield and weight.
Significant genotype × cultural condition interactions necessitate the development of tailored protocols for optimal microtuber production in different potato varieties.