Efeito da estratificação de sementes na emergência e desenvolvimento inicial de plântulas de porta-enxertos de pessegueiro

Martins, Antonio Sidnei; Bianchi, Valmor João; Zanandrea, Ilisandra; Spinelli, Victor Mousinho; Fachinello, José Carlos

doi:10.15361/1984-5529.2014v42n4p366-375

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…The production of peach rootstocks [Prunus persica (L.) Batsch] is tra ditionally done by seed, being the simplest and the most inexpensive method when compared to clonal propagation (Martins et al, 2014;Fischer et al, 2016). Despite the fact that stone fruit production is very important in Brazil, the country still presents relatively low orchard aver age productivity, mainly in Rio Grande do Sul state (Fischer et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Contrasting aspects of the physical and physiological dormancy shown by seeds from different peach rootstocks

et al. 2022

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Considering that cultivars of peach rootstocks selected to be propagated by seeds show variation in the degree of physiological dormancy and peculiarities regarding the limitation imposed by the endocarp, it is essential to define the cold stratification period and the ideal temperature to be used during the pre-germination treatment. Isolated for each cultivar, knowledge of these variables which will provide viability in the production of peach rootstocks via seeds, in the presence of the endocarp, at a larger scale. Two germination tests were carried out, in a completely randomized experimental design and 4 x 3 factorial scheme, with four replications, each one consisting of 25 endocarps. The first experiment was performed with four cultivars (Aldrighi, Capdebosq, Okinawa Roxo and Tsukuba 1) and three stratification temperatures (1°C, 4°C and 7°C) for a period of 90 days. For the second experiment, the same cultivars were used, two temperatures (7°C for ‘Aldrighi’ and ‘Capdebosq’ and 4°C for ‘Okinawa Roxo’ and ‘Tsukuba’) and three stratification periods (40, 80 and 120 days), followed by sowing in substrate under greenhouse conditions for a period of 45 days, with subsequent endocarp breaking and re-sowing. The pre-germination treatment at 7°C for 90 days is sufficient to obtain high germination percentage of ‘Aldrighi’ and ‘Capdeboscq’ seeds in the presence of the endocarp. Under the stratification conditions tested, the seeds of ‘Okinawa Roxo’ and ‘Tsukuba 1’ require rupture of the endocarp to reactivate the germinative embryonic process.

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Section: Introductionmentioning

confidence: 99%

Contrasting aspects of the physical and physiological dormancy shown by seeds from different peach rootstocks

et al. 2022

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“…Peach (Prunus persica L.) rootstock cultivars are commonly selected for scion compatibility, ease of propagation, vigor, development, flowering season, yield, low cold requirement, resistance to diseases, effects on the physicochemical characteristics of the fruits, plant longevity and adaptation to adverse climatic conditions (Martins et al, 2014;Picolotto et al, 2012;Warschefsky et al, 2016). However, kinetic parameters related to nutrient uptake efficiency are not typically considered, such as nitrogen (N) forms nitrate (NO 3 − ) and ammonium (NH 4 + ), as N is the nutrient that most affects growth, yield and fruit composition (Karavin et al, 2016;Zhang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Morphological and kinetic parameters of the uptake of nitrogen forms in clonal peach rootstocks

Paula

Marques

Rodrigues

et al. 2018

Scientia Horticulturae

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Peach (Prunus persica L.) rootstock cultivars are typically selected for scion compatibility, ease of propagation, vigor, development, flowering season, yield, low need for cold temperatures, resistance to diseases, effects on the physical-chemical characteristics of the fruit, plant longevity and adaptation to adverse edaphoclimatic conditions. However, kinetic parameters related to nutrient uptake efficiency are usually not considered, such as those of nitrate (NO 3 −) and ammonium (NH 4 +). N is the nutrient that most impacts growth and yield. The objective of this study was to show the importance of the kinetic parameters of NO 3 − and NH 4 + uptake as additional criteria for selecting peach rootstocks. The experiment was conducted in a greenhouse. Three rootstock ('Aldrighi', 'Tsukuba1' and 'Clone 15′) were grown for 30 days in a pot containing 0.1 mol L-1 CaSO4 solution to reduce internal reserves of N. Afterwards, the plants were placed in Hoagland nutrient solution, where periodic collections of the nutrient solution were carried out for three days and the concentrations of NO 3 − and NH 4 + were determined. After the third day of collecting the solution, the plants were collected and then separated into leaves, roots and stems. Dry matter and total N content were assessed. The kinetic parameters related to NO 3 − and NH 4 + uptake (maximum uptake rate-V max , affinity constant-K m , Minimum concentration-C min , Influx-I) were calculated using Cinética software. The most efficient rootstock for NO 3 − and NH 4 + uptake was 'Tsukuba1', as it showed the lowest values of C min and K m and the highest values of V max and I max for NO 3 − and NH 4 +. NO 3 − uptake in 'Tsukuba1' and 'Aldrighi' showed a two-phase uptake pattern, suggesting the presence of low and high affinity transport systems. On the other hand, NH 4 + uptake in the three cultivars apparently followed a one-phase uptake pattern, suggesting the presence of a high affinity transport system. The kinetic parameters of NO 3 − and NH 4 + uptake are additional criteria that can be used in selecting peach rootstocks, as they directly influence shoot and root dry matter production and N accumulation in leaves.

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Efeito da estratificação de sementes na emergência e desenvolvimento inicial de plântulas de porta-enxertos de pessegueiro

Cited by 2 publications

References 7 publications

Contrasting aspects of the physical and physiological dormancy shown by seeds from different peach rootstocks

Contrasting aspects of the physical and physiological dormancy shown by seeds from different peach rootstocks

Morphological and kinetic parameters of the uptake of nitrogen forms in clonal peach rootstocks

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