Genetika 2019 Volume 51, Issue 2, Pages: 417-428
https://doi.org/10.2298/GENSR1902417K
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Morphological, physiological and productivity response in garden pea genotypes during high temperature stress
Kalapchieva Slavka (Department of Breeding, Variety Maintenance and Introduction, Maritsa Vegetable Crops Research Institute, Plovdiv, Bulgaria)
Topalova Elena (Department of Breeding, Variety Maintenance and Introduction, Maritsa Vegetable Crops Research Institute, Plovdiv, Bulgaria)
Petkova Valentina (Department of Breeding, Variety Maintenance and Introduction, Maritsa Vegetable Crops Research Institute, Plovdiv, Bulgaria)
Changes in morphological characteristics, productivity and fluorescence
emission parameters at normal and high temperature values under field
conditions of 10 varieties and lines of the species Pisum sativum L. from
the collection of MARITSA Vegetable Crops Research Institute were
established. The influence of high temperature on the condition and
functional activity of the photosynthetic apparatus (PSA) was studied by
analyses of chlorophyll fluorescence characteristics of photosystem II
(PSII) in the pea leaves. Plants were subjected to stress from high
temperature during the reproductive period (bud formation - flowering
phases), which is considered particularly critical for pea plants. The
morphological performances and productivity have been influenced by climatic
characteristics of the years. The screening for thermostability of the
photosynthetic apparatus to the high temperature characterizes Skinado,
Faboundo and line 95/4 as the most tolerant on the basis of analysis of
fluorescence induction parameters. The most sensitive are lines 72/2 and
72/9. Varieties of Skinado and Fabundo respond with higher yields of green
pods and grains in the conditions of the first year, categorized as hot
compared to 2013. We consider that the indicated accessions are suitable for
the pea-breeding programme to high temperature stress tolerance.
Keywords: pea, breeding, abiotic stress, reproductive period, yield