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Byoung Ryong Jeong, Chi Won Lee, and Larry S. Daley

A non-destructive in vivo spectroscopic method for leaf chlorophyll (Chl) measurement was developed. Spectroscopic analyses of intact leaves of ageratum, petunia and salvia showed strong correlations between leaf light absorption at 723 nm and Chl-a contents. NH4 + increased Chl contents in both ageratum and petunia whereas NO3 - increased Chl contents in salvia. Plants fed with NH4 + + NO3 - also contained higher Chl. Chl-a/-b ratio in salvia was lowered by NO3 -. Ageratum, petunia and salvia grown with either NH4 +, NO3 -, or NH4 + + NO3 - were also examined for their light absorption characteristics. Light absorption at 705 nm by ageratum and petunia leaves was increased by NH4 + treatment. NH4 + is believed to have changed the structure of photosystem I in both ageratum and petunia but not in salvia. This result explain reasons for salvia's sensitivity to NH4 + fed as a sole N source.

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Byoung Ryong Jeong, Chi Won Lee, and Larry S. Daley

A non-destructive in vivo spectroscopic method for leaf chlorophyll (Chl) measurement was developed. Spectroscopic analyses of intact leaves of ageratum, petunia and salvia showed strong correlations between leaf light absorption at 723 nm and Chl-a contents. NH4 + increased Chl contents in both ageratum and petunia whereas NO3 - increased Chl contents in salvia. Plants fed with NH4 + + NO3 - also contained higher Chl. Chl-a/-b ratio in salvia was lowered by NO3 -. Ageratum, petunia and salvia grown with either NH4 +, NO3 -, or NH4 + + NO3 - were also examined for their light absorption characteristics. Light absorption at 705 nm by ageratum and petunia leaves was increased by NH4 + treatment. NH4 + is believed to have changed the structure of photosystem I in both ageratum and petunia but not in salvia. This result explain reasons for salvia's sensitivity to NH4 + fed as a sole N source.

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Chenping Xu and Beiquan Mou

(Spectronic Genesys; Spectronic Instruments, Rochester, NY). Chlorophyll a, b and carotenoid contents (C a , C b , and C x ) were calculated using the formula described by Lichtenthaler (1987) : C a (mg/L) = 16.72A 665 – 9.16A 652 , C b (mg/L) = 34.09A 652

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Yuji Yamada, Masayoshi Nakayama, Hiromitsu Shibata, Sanae Kishimoto, and Takashi Ikeda

contents. The chlorophyll and carotenoid contents of the fruit were measured as described by Kishimoto et al. (2007) with some modifications. Samples from individual different fruit were ground in liquid nitrogen with a mortar and pestle, mixed with

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Ming Ding, Beibei Bie, Wu Jiang, Qingqing Duan, Hongmei Du, and Danfeng Huang

chlorophyll contents ( A ) and leaf photochemical efficiency ( B ) of non-grafted watermelon ( Citrullus lanatus ‘Zaojia 84-24’) seedlings and grafted watermelon seedlings with pumpkin ( Cucurbita moschata ‘Zhuangshi’) rootstocks during 15 °C storage in

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Maurizio Mulas and Rita A.M. Melis

composition and liqueur quality. For this reason, the leaves of five myrtle cultivars growing in two sites of Sardinia were analyzed after spring and winter samplings for chlorophyll, polyphenol, and tannin contents in 2000 and 2001. The hydroalcoholic

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Jing Huang, Ya-liang Xu, Fa-min Duan, Xu Du, Qi-chang Yang, and Yin-jian Zheng

+ chlorophyll   b Carotenoids ( mg / L ) = 4 .7 × O D 440 − 0.27   ×   total   chlorophyll Photosynthetic   pigment   content ( mg / g ) = photosynthetic   pigment   concentration   × extraction   solution   volume/0 .5 g Soluble sugar measurement. The contents

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Xiaotao Ding, Liyao Yu, Yuping Jiang, Shaojun Yang, Lizhong He, Qiang Zhou, Jizhu Yu, and Danfeng Huang

( Fig. 2 ). Fig. 2. Leaf fresh weight per unit leaf area at different positions. 1L through 15L indicate first through the 15th leaves. Changes in leaf chlorophyll and carotenoid contents at different positions. The chlorophyll a and b , and total

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Donavon Sonnenberg, Patrick A. Ndakidemi, Ambrose Okem, and Charles Laubscher

content at week 2 in plants treated with 10–16 L·h −1 water regimens compared with the control ( Table 6 ). There was a decrease in chlorophyll contents in all the treatments from week 3 to 5. A progressive increase in chlorophyll content was recorded

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Lingyun Yuan, Yujie Yuan, Shan Liu, Jie Wang, Shidong Zhu, Guohu Chen, Jinfeng Hou, and Chenggang Wang

the seedlings were dried in an oven at 75 °C for 48 h to gain the shoot dry weight. Chlorophyll (Chl) contents. The Chl content was determined as the method of Strain and Svec (1966) . The pigments were extracted from the forth fully expanded leaf