Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

Sekozawa, Yoshihiko; Sugaya, Sumiko; Gemma, Hiroshi; Iwahori, Shuichi

doi:10.21273/hortsci.38.2.288

Cited by 12 publications

(4 citation statements)

References 19 publications

(25 reference statements)

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“…In our study, the fact that ABA increased in PDJ-or spermine-treated fruit suggests that these treatments may be effective for improving chilling tolerance. It has been shown that the application of PDJ spray in the blooming period decreased spring frost injury in Japanese pears (Pynus pyrifolia Nakai) based on the increase of the sugar concentration in the fruit (Secozawa et al 2003). In our study, although the branches with fruit were placed in darkness, the possibility of sugar accumulation or sugar translocation from leaves in the PDJ-applied fruit that exhibited decreased lowtemperature injury should also be investigated.…”

Section: Discussionmentioning

confidence: 92%

Effect of low-temperature stress on abscisic acid, jasmonates, and polyamines in apples

2007

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The effect of low temperatures on polyamines, jasmonates, abscisic acid (ABA), and antioxidant activities was investigated in apple fruitlets. Although endogenous ABA concentrations were not significantly different between untreated control fruit kept at À28C and those kept at 208C, endogenous jasmonic acid (JA), putrescine, and spermidin concentrations at À28C were generally higher than those at 208C. Endogenous ABA concentrations increased in n-propyl dihydrojasmonate (PDJ)-or spermine-treated fruit in comparison to the untreated control at 20 and À28C. The applications of PDJ or spermine decreased low-temperature injuries such as splitting and spotting in fruit. Although the IC 50 of 1,1-diphenil-2-pycrylhydrazyl (DPPH)-radical scavenging activities was not significantly different among the treatments, the IC 50 of O 2 À -scavenging activities in PDJ-treated or Spm-treated fruit at 5 days after the low-temperature treatment was lower than in the untreated control at 20 and À28C. The expression of MdCHS increased in Spm-treated fruit. The concentrations of ascorbic acid, catechin, chlorogenic acid, epi-catechin, and phloridzin in Spm-treated fruit were higher than in the untreated control at À2 or 208C. These facts suggest that ABA, jasmonates and polyamines may be associated with low-temperature stress tolerance in apple fruitlets.

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Section: Discussionmentioning

confidence: 92%

Effect of low-temperature stress on abscisic acid, jasmonates, and polyamines in apples

2007

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“…The mechanism of JA against CI is unclear. It has been observed that PDJ application in the blooming period decreased spring frost injury in Japanese pears (Pyrus pyrifolia Nakai) (Sekozawa et al, 2003). It was concluded that the increase of sugar content in the PDJ-treated fl ower was related to the alleviation of frost injury.…”

Section: Resultsmentioning

confidence: 99%

Relationships between Jasmonates and Chilling Injury in Mangosteens Are Affected by Spermine

Kondo¹,

Jitratham²,

Kittikorn³

et al. 2004

HortSci

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Effects of low temperature and chilling injury (CI) on jasmonic acid (JA) and methyl jasmonate (MeJA) concentrations were investigated in mangosteens (Garcinia mangostana L.). JA concentrations in the skin of fruit stored at 7 °C increased significantly compared with that of those stored at 13 °C, but JA decreased with the occurrence of visible symptoms of CI. Neither an increase in JA nor CI was detected in pulp of fruit stored at 7 °C. JA concentrations in the skin of fruit treated with spermine (Spm) and stored at 7 °C also increased, but at a lesser extent than in untreated fruit. Thus, the response of JA to low temperatures appears to be limited to chill-susceptible parts of the fruit. The decrease of JA and the onset of CI was delayed in fruit treated with Spm kept at 7 °C compared with untreated control fruit. Exogenous application of n-propyl dihydrojasmonate, which is a jasmonic acid derivative, effectively decreased CI. These results suggest that low temperature-induced JA accumulation may play a protective role against CI. The application of jasmonates may increase chill-resistance in fruit.

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“…Browning of the female tissue due to low-temperature exposure has been observed (Oya, 2012;Sakuma et al, 2013;Sato, 1982). Sugar accumulation inhibits intracellular freezing and prevents frost injury in the Japanese pear flower (Sekozawa et al, 2003). The sugar content of a Japanese pear bud decreases from winter to spring (Sekozawa, 2004) whereas in the pollen, starch is turned into sugar, and sugar accumulates in the pollen grain as it matures (Hayashi and Tanabe, 1991).…”

Section: Sensitive Pollen Stage Against Low Temperaturementioning

confidence: 99%

“…In Japanese pears (P. pyrifolia Nakai), there are many studies on the influence of low temperatures on female organs (Oya, 2012;Sakuma et al, 2013;Sato, 1982;Sekozawa et al, 2003), but few on the effect upon pollen. Previously, it was reported that the tetrad to early microspore stage of pollen development was most sensitive to low temperature in Japanese pears (Hirata, 2000), but low-temperature sensitivity among cultivars and temperatures at which damage occurs remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Varietal Tolerance of Pear Flower Pollen to Low-Temperatures Treatment During Pollen Development and Damage Inhibition by Coffee Extract

et al. 2023

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Artificial pollination is essential in pears (Pyrus spp.) for stable fruit set and the production of high-quality fruit. Low temperatures in the early spring before bud flowering can damage pear pollen and pose a special risk to pollen production for artificial pollination. In this study, we sought to identify, in pears, the flower bud stage most susceptible to low-temperature pollen damage, observe anther development abnormalities, compare pollen sensitivities among seven pear cultivars, and evaluate the pollen cold injury inhibition efficacy of a coffee extract treatment for flower buds. The most cold-sensitive flower bud stage for the Japanese pear 'Kosui' pollen was the scale-separation stage, with pollen in that stage ranging from the pollen mother cell to the tetrad stage. In the 'Kosui' flower bud treated at −3°C over 10 h, the typical cold-induced anther development abnormalities were tapetum hypertrophy, cell debris, and anther locule shrinkage. Flower buds at the scale-separation stage of seven pear cultivars were treated with low temperatures in a model based on daily temperature changes during the winter season in Saitama, Japan, to reach daily minimum temperatures of 0, −1, −2, −3, −4, −5, and −6°C. The pollen germination rates of 'Hosui' were unaffected by low-temperature treatments between 0 and −6°C. Overall 'Hosui' showed the least reduction in pollen germination rate than the other cultivars evaluated. Our results strongly suggest that 'Hosui' is the most tolerant to low temperatures among the tested cultivars. In the laboratory environment, the application of a coffee extract before cold treatment delayed flower bud freezing and preserved pollen germination. These results are helpful in selecting varieties and treatments for the prevention of cold injury in pear pollen production.

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Cold Tolerance in 'Kousui' Japanese Pear and Possibility for Avoiding Frost Injury by Treatment with n-Propyl Dihydrojasmonate

Cited by 12 publications

References 19 publications

Effect of low-temperature stress on abscisic acid, jasmonates, and polyamines in apples

Effect of low-temperature stress on abscisic acid, jasmonates, and polyamines in apples

Relationships between Jasmonates and Chilling Injury in Mangosteens Are Affected by Spermine

Varietal Tolerance of Pear Flower Pollen to Low-Temperatures Treatment During Pollen Development and Damage Inhibition by Coffee Extract

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