• 제목/요약/키워드: Pokkali

검색결과 11건 처리시간 0.02초

Effect of Salinity on Lignin and Hydroxycinnamic Acid Contents in Rice

  • Wi Seung Gon;Kim Jae-Sung;Kim Jin-Hong;Baek Myung Hwa;Yang Dae-Hwa;Lee Myung Chul;Chung Byung Yeoup
    • 한국작물학회지
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    • 제49권5호
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    • pp.368-372
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    • 2004
  • The lignin contents between IR-29 and Pokkali were not significantly different in the absence of NaCl, but they were slightly increased at 40 mM NaCl. Although lignin contents were not relatively significantly different between salt treated and control plants, the total yields of alkaline nitrobenzene oxidation ranged from 17.4-20.0 mg/g of cell wall residue at 40 mM NaCl were significantly different compared with control plants (11.8-12.2 mg/g). The total amounts of ester-linked hydroxycin-namic acids in IR-29 were decreased from 14.5 to 9.9mg/g, while Pokkali is almost same levels (14.9-15.0 mg/g) under treated and control with 40 mM NaCl. In contrast, the total amounts of ether-linked hydroxycinnamic acids were increased from 9.4 to 13.9 mg/g together with an opposite trend in Pokkali as a decrease 10.9 to 8.8 mg/g under treated and control with 40 mM NaCl. These results revealed that IR-29 is more sensitive in response to 40 mM NaCl in terms of hydroxycinnamic acids than Pokkali.

벼 내염성 및 비내염성 품종들의 양이온함량과 그의 유전 (Cation Content of Salt-Tolerant and -Susceptible Cultivars and Its Inheritance in Rice)

  • 원용재;허문회;고희종
    • 한국작물학회지
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    • 제37권1호
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    • pp.1-8
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    • 1992
  • 내염성 수도 육종에 있어서 내염성정도의 표시로 생육량과 양이온함량을 선발의 지표로 이용할 수 있는가를 구명하기 위하여 내염성품종과 비내염성품종들의 모본, $F_1$, $F_2$ 식물에 염처리를 하여 생육량과 양이온함량을 조사하였다. 그 결과를 요약하면 다음과 같다. 1. 공시된 벼 내염성품종들은 염의 농도가 높아갈 때 비내염성품종에 비하여 초장과 건물중의 감소가 적었다. 2. 내염성품종인 Pokkali, Annapurna는 비내염성품종인 wx817, 신설찰에 비하여 염처리시 $Na^{+}$ 함량이 적고, $K^{+}$함량이 많았으며 $Na^{+}$ / $K^{+}$비가 현저하게 낮았으나, $Ca^{++}$, M $a^{++}$함량은 뚜렷한 경향이 없었다. 3. 염처리시 초장, 분얼수, 건물중 등의 생육량은 $Na^{+}$함량, $Na^{+}$/ $K^{+}$비와 유의한 부의 상관을 보였고, $K^{+}$함량과는 정의 상관을 나타냈다. 그러나 $Ca^{++}$$Mg^{++}$함량은 생육량과 유의한 상관을 보이지 않았다. 따라서 $Na^{+}$, $K^{+}$함량 및 $Na^{+}$ / $K^{+}$비는 내염성정도를 표시하는 한가지 지표로서 이용 가능할 것으로 생각된다. 4. 염처리시 내염성품종과 비내염성품종 모두 얼자별 양이온함량은 유의한 차이를 보이지 않았으나, 주간의 엽들은 상위엽에서 하위엽으로 내려갈수록 $Na^{+}$함량이 많아지고, $Na^{+}$ / $K^{+}$ 비가 높아지는 경향이었다. 5. 내염성품종인 Pokkali, Annapurna와 비내염성 품종인 wx817, wx126과의 $F_1$에서 염처리시 초장과 건물중 및 $K^{+}$함량, $Na^{+}$ / $K^{+}$ 비는 내염성 모본인 Pokkali와 유사하였으며, $Na^{+}$함량은 각 모본의 중간정도를 보여, 내염성은 비내염성에 대하여 우성으로 나타났다. 6. 내염성품종인 Pokkali와 비내염성품종인 wx817간의 $F_2$에서 염처리시 내염성 관련형질의 변이분포는 건물중과 초장, $Na^{+}$$K^{+}$함량, $Na^{+}$ / $K^{+}$비가 내염성모본인 Pokkali에 가깝게 분포하였다. 유전력은 형질별로 0.604~0.811 정도이었고, 조사형질간 유전상관 및 표현형상관은 대체로 고도로 유의한 상관관계를 보였다.

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벼멸구 저항성 유전자와 내염성과의 연관 (Linkage Between Brown Planthopper Resistance Gene and Salt Tolerance in Rice)

  • 양대화;김진홍;위승곤;백명화;임상용;이인석;이규성;이명철;임용표;정병엽;김재성
    • 생명과학회지
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    • 제15권1호
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    • pp.61-65
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    • 2005
  • 벼멸구(Nilapawata lugens Stal.)에 대한 저항성 마커 (R208)에서 확실한 차이를 보인 두 자포니카 품종(일품벼과 상해향혈나)을 대상으로 벼멸구 저항성 유전자(Os-Bil)와 내염성과의 관련성을 조사하였다. 이를 위해 두 품종에서 염처리에 의한 Os-Bil 발현량의 변화를 real-time PCR을 이용해 정량화 하였으며, 인디카 두 품종(Pokkali와 IR29)의 결과와 비교하였다. 일품벼는 50, 200 mM NaCl 처리에서 Os-Bil 유전자의 발현량이 농도 의존적으로 감소하였으며, 상해향혈나는 50mM에서만 약간 증가하고 200mM에서는 크게 감소하였다. 비교해서, 내염성인 Pokkali는 Os-Bil의 발현량이 100 mM의 NaCl 처리에 의해 약 2배 증가하였으나 감수성인 IR29는 같은 농도에서 발현량이 감소하였다. 이러한 결과들은 벼멸구 저항성 유전자(Os-Bil)가 적어도 인디카 품종들의 내염성 차이에 관여함을 의미하는 것으로 보인다.

Salinity Tolerance of Progenies between Korean Cultivars and IRRI's New Plant Type Lines in Rice

  • Lee, Seung-Yeob;Dharmawansa Senadhira
    • 한국작물학회지
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    • 제43권4호
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    • pp.234-238
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    • 1998
  • To select new germplasm for salinity tolerance from new plant type (NPT) breeding lines, the sixty F$_4$ lines selected from the crosses between Korean cultivars and IRRI's NPT lines were evaluated for salinity tolerance at the seedling stage with salinized culture solution (EC=12 dS/m) in the controlled conditions. Two NTP lines derived from a cross between 'Ilmibyeo' and 'IR66152-AC5-1', 'HR15258-7-1' and 'HR15258-27-1', were found to have good tolerance. The salinity tolerance of the lines was compared to their parents and the sensitive ('IR29') and tolerant ('Pokkali') checks in three salinity levels, no salinity (control) and an EC of 12 and 16 dS/m. Visual salinity score, shoot Na+ and Na-K ratio in two NPT lines was significantly low compared with the parents and IR29. Indicating that salinity tolerance of the lines might be derived from a transgressive segregation. The relative water content of the lines was higher than Pokkali, and the dry weight of shoot and root was proportionally decreased to salinity score and salinizing concentration. The visual salinity scores were significantly correlated with shoot Na concentration, Na-K ratio, relative water content, and reduction of dry weight (P<0.01). Their tolerance was attributed to root and shoot characteristics that led to high shoot water content, thus diluting the toxic effect of salts.

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Differential responses of two rice varieties to salt stress

  • Ghosh, N.;Adak, M.K.;Ghosh, P.D.;Gupta, S.;Sen Gupta, D.N.;Mandal, C.
    • Plant Biotechnology Reports
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    • 제5권1호
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    • pp.89-103
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    • 2011
  • Two rice varieties, viz. Nonabokra and Pokkali, have been evaluated for their responses to salinity in terms of some physiological and biochemical attributes. During the exposure to salinity (200 mM concentration of sodium chloride for 24, 48, and 72 h), a significant increase in sodium was recorded which was also concomitant with the changes of other metabolic profiles like proline, phenol, polyamine, etc. The protein oxidation was significantly increased and also varied between the two cultivars. The changes in activities of anti-oxidative enzymes under stress were significantly different to the control. The detrimental effects of salinity were also evident in terms of lipid peroxidation, chlorophyll content, protein profiles, and generation of free radicals; and these were more pronounced in Pokkali than in Nonabokra. The assessment and analysis of these physiological characters under salinity could unravel the mechanism of salt responses revealed in this present study and thus might be useful for selection of tolerant plant types under the above conditions of salinity.

Physiological Response to Salinity Stress of Japonica/Indica Lines Tolerant to Salt at Seedling Stage

  • Ko, Jong-Cheol;Lee, Kyu-Seong;Kim, Ki-Young;Choi, Weon-Young;Kim, Bo-Kyung;Shin, Woon-Cheol;Ko, Jae-Kwon;Yum, Song-Joong
    • 한국육종학회지
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    • 제43권5호
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    • pp.391-398
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    • 2011
  • Physiological responses to salinity stress were evaluated in six rice genotypes differing in their tolerance to salinity at the seedling stage. Susceptible genotypes ('Dongjingbyeo', 'Hwayeongbyeo', and 'IR29') showed salt injury symptoms (mean 8.8) and higher visual score under salt stress than that of tolerant ones ('Pokkali', 'IR74009', and 'IR73571'). As salinity affects growth and physiological parameters, the six genotypes thus showed significant reduction because of salt stress. Tolerant Japonica/Indica bred lines ('IR74009', 'IR73571') showed lower reduction, 33.9%, 34.5%, and 50%, respectively, in plant seedling height, dry shoot weight and dry root weight than those of the susceptible Japonica varieties ('Dongjingbyeo', 'Hwayeongbyeo'), and the highest reduction under salt stress was observed in dry root weight, followed by dry shoot weight and seedling height, respectively. Shoot $Na^+$ concentration of IR74099 and IR73571 was lower than that of the susceptible varieties, 'Dongjinbyeo' and 'Hwayeongbyeo'. There were no significant differences among genotypes in root $Na^+$ concentration. Shoot $K^+$ concentration showed a reverse tendency compared to shoot $Na^+$ concentration. IR74009 and IR73571 had considerably lower ratio compared to 'Dongjinbyeo' and 'Hwayeongbyeo' in $Na^+/K^+$ ratio of their shoot and was not different the tolerant check, 'Pokkali'.

Extrinsic Role of Gibberellin Mitigating Salinity Effect in Different Rice Genotypes

  • Muhammad Farooq;Eun-Gyeong Kim;Yoon-Hee Jang;Kyung-Min Kim
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2022년도 추계학술대회
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    • pp.284-284
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    • 2022
  • The overall effects of gibberellic acid (GA3) with NaCl on different rice genotypes are inadequately understood. The present study determines the effect of different GA3 concentrations on the morphophysiological, molecular and biochemical effects of 120 mM NaCl salt stress in rice seedlings. Salt stress reduced germination percentages and seedling growth and decreased bioactive GA content. It also downregulated the relative expression of a-amylase-related genes - OsAmy1A, OsAmy1C, and OsAmy3C in the salt-sensitive IR28 cultivar. Salt stress differentially regulated the expression of GA biosynthetic genes. Salt stress increased antioxidant activity in all rice genotypes tested, except in IR28. GA3 (50 and 100 µM) mitigates the effect of salt stress, rescuing seed germination and growth attributes. GA3 significantly increased bioactive GA content in Nagdong and pokkali (50 µM) and Cheongcheong and IR28 (100 µM) cultivars. The a-amylase genes were also significantly upregulated by GA3. Similarly, GA3 upregulated OsGA2oxl and OsGA2ox9 expression in the Cheongcheong and salt-sensitive IR28 cultivars. The present study demonstrated that salt stress inactivates bioactive GA - inhibiting germination and seedlings growth - and decreases bioactive GA content and GSH activity in IR28 and Pokkali cultivars. Further, GA3 significantly reversed the effects of 120 mM NaCl salt stress in different rice genotypes. The current study also suggests if we know the coastal area water NaCl concentration we can apply the exogenous GA3 accordingly. Thus, we would be able to grow rice cultivars near the coastal area and reduce the rice damage by salinity.

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간척지 토양개량을 위한 내염성 식물의 활용성 평가 (Evaluation of Salt-Tolerance Plant for Improving Saline Soil of Reclaimed Land)

  • 이경보;강종국;;이덕배;박찬원;김재덕
    • 한국토양비료학회지
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    • 제40권3호
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    • pp.173-180
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    • 2007
  • 본 연구는 간척지 친환경농업 기반조성을 위하여 신간척지 토양개량을 위한 내염성 식물 활용성을 평가하고자 국내외에서 내염성 식물 18종을 수집하여 시험을 수행하였다. 신간척지 토양에서 파종된 식물의 출현율은 FL478(벼)>Barnyard grass>Pokkali>Atriplex>Sesbania>Rumex>Alfalfa>Tall Fescue>Ryegrass>Sudan grass의 순이었다. 신간척지 토양에서 생육후기까지 생육이 가능한 식물은 Limonium, Atriplex, Barnyard grass 및 Sesbania 등 4종이었다. Barnyard grass의 생체중은 $1.21kg\;m^{-2}$, 건물중은 $0.48kg\;m^{-2}$이었다. Sesbania의 생체중은 $1.55kg\;m^{-2}$, 건물중은 $0.68kg\;m^{-2}$로 가장 많았으며, Atriplex의 생체중은 $1.04kg\;m^{-2}$, 건물중은 $0.42kg\;m^{-2}$이었다. 그리고 Limonium의 생체중은 $1.04kg\;m^{-2}$, 건물중은 $0.32kg\;m^{-2}$이었다. Sesbania와 Barnyard grass를 시용한 결과 인산함량은 시험전 $62.5g\;kg^{-1}$에 비하여 각각 $76.1g\;kg^{-1}$, $78.1g\;kg^{-1}$으로 증가하였다. 유기물함량은 시험 전 토양이 $2.65g\;kg^{-1}$이었지만 내염성 식물을 시용함으로서 $2.81{\sim}4.60g\;kg^{-1}$으로 증가하였다. 녹비 시용 전 토양 용적밀도는 $1.42Mg\;m^{-3}$이었으나 Sesbania와 Barnyard grass를 시용한 토양의 용적밀도는 $1.39Mg\;m^{-3}$로 낮아졌다.

벼 유묘내염성 검정체계 확립에 의한 내염성 계통 선발 (Selection of Salinity Tolerant Lines by Establishment of Salt Screening Techniques at Rice Seedling Stage)

  • 고종철;최원영;백남현;강현중;정진일;하기용;김정곤;이규성
    • 한국육종학회지
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    • 제41권1호
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    • pp.25-31
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    • 2009
  • 벼 내염성 유묘검정에서 실용성, 경제성, 정밀성이 우수한 검정체계를 확립하고벼 자포니카 내염성 중간모본 및 품종개발을 위한 내염성 유전자원 및 품종을 선발 이용하고자 본 시험을 수행하였다. 1. 증류수 이용 Yoshida 양액에 NaCl를 첨가한 염처리는 0.3%, 0.5%, 0.7%로 희석한 바닷물로 Yoshida 양액을 제조한 염처리 보다 유묘 내염성 계통을 선발하는데 효율적이었다. 2. 수돗물로 양액 제조 처리는 증류수로 양액 제조 처리와 유묘 내염성 검정 달관평가에서 차이가 없었다. 3. 년차 및 지역간 내염성 재연성을 확인하기 위하여 '02년, '03년 계화도출장소 하계 및 '04년 국제미작연구소에서 건기에 유묘 내염성을 검정한 결과 IR73571-3B-11-3-K2 등 6계통의 3개년('02, '03 및 '04) 평균 유묘 내염성은 3~4.2로 Pokkali 내염성 3과 비슷하였고 년차 및 지역간 안정적 유묘내염성을 보였다. 4. Pokkali 및 FL478과 내염성이 비슷한 IR73571-3B-11-3-K2 등 6계통의 출수기는 8.16~8.21일로 동진벼와 같거나 2~6일 늦었으며 간장은 대부분의 계통이 동진벼 보다 7~17 cm작았으나 수장은 6~9 cm 길었다. 등숙율 및 수량은 동진벼 보다 각각 52.2~14.7%, 50~5% 낮았다.